{"title":"Royal Purple","description":"\u003cp\u003eBrowse 30 Royal Purple products at British Garage, including engine \u0026amp; motor oils and transmission fluids. Every listing names the vehicles and fitments it suits — check the compatibility details on each product page before you order.\u003c\/p\u003e\u003cp\u003eFree tracked UK delivery on every order and 30-day returns.\u003c\/p\u003e","products":[{"product_id":"royal-purple-synchromax-manual-transmission-fluid-4-quart-pack-4-x-1-qt-improved-shift-feel-gear-protection","title":"Royal Purple Synchromax Manual Transmission Fluid 4-Quart Pack (4 x 1 qt) — Improved Shift Feel \u0026 Gear Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Synchromax is a high-performance manual transmission fluid formulated to improve shift feel, protect gears, and extend lubricant life for a wide range of manual gearboxes.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eSynchromax by Royal Purple is engineered for manual transmissions that call for automatic transmission fluids, multi-viscosity motor oils, or straight-grade motor oils, and it works well in 2-cycle motorcycle gearboxes too. The formula contains Royal Purple’s proprietary additive package including Synerlec, designed to lower friction, reduce gear noise, and protect internal components from wear and corrosion across a broad temperature range. This 01512 pack includes four 1-quart bottles—convenient for refills, multiple vehicles, or workshop stocking.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Synchromax change shifting performance?\u003c\/h3\u003e\n\u003cp\u003eSynchromax reduces internal friction and improves synchronizer engagement so shifts feel smoother and more consistent in cool and warm conditions. Drivers often notice crisper, quieter shifting because the formula improves synchronizer matching and reduces harshness during gear changes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmoother upshifts and downshifts across operating temperatures\u003c\/li\u003e\n  \u003cli\u003eReduced transmission clunk and gear engagement shock\u003c\/li\u003e\n  \u003cli\u003eHelps preserve synchronizer surfaces for long-term feel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fluid protect gears and bearings?\u003c\/h3\u003e\n\u003cp\u003eThe Synchromax blend focuses on wear protection and corrosion inhibition to safeguard gears, bearings, and other internal parts. Its antioxidants and rust inhibitors help maintain component integrity and lower operating temperatures that contribute to longer service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnhanced wear protection against pitting and scuffing\u003c\/li\u003e\n  \u003cli\u003eSuperior rust and corrosion resistance for stored or damp environments\u003c\/li\u003e\n  \u003cli\u003eOxidation stability to help extend drain intervals and reduce deposits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Synchromax suitable for motorcycles and mixed-spec applications?\u003c\/h3\u003e\n\u003cp\u003eYes—Synchromax is formulated to be versatile, serving transmissions that specify ATF, multi-viscosity oils, or straight grades, and it’s well-suited for many 2-cycle motorcycle gearboxes. Always check the vehicle or equipment manufacturer’s recommendations before switching fluids, but Synchromax is engineered for broad compatibility where such crossover fluids are allowed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible where ATF or certain motor oil-based manual fluids are specified\u003c\/li\u003e\n  \u003cli\u003eFormulated for performance in selected 2-cycle motorcycle gearboxes\u003c\/li\u003e\n  \u003cli\u003eUseful as a single-stock option for mixed workshop needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance benefits can I expect from using this 4-quart kit?\u003c\/h3\u003e\n\u003cp\u003eThe four 1-quart bottles let you service multiple gearboxes or keep spares on hand for scheduled maintenance, minimizing downtime. Using Synchromax as part of regular service can help keep internal parts cleaner and operating temperatures lower, which supports component longevity and predictable shifting.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour quarts cover many common fill sizes or multiple service intervals\u003c\/li\u003e\n  \u003cli\u003eImproved oxidation stability helps reduce sludge and varnish buildup\u003c\/li\u003e\n  \u003cli\u003eLower operating temperature potential reduces thermal stress on parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Royal Purple Synchromax 01512 is aimed at vehicle owners, mechanics, and motorcycle riders who need a versatile, high-quality manual transmission fluid that improves shift feel and protects drivetrain components. It’s especially useful for shops that service a variety of makes and models, enthusiasts who demand better gear engagement, and anyone who prefers to keep a ready supply of premium fluid for routine maintenance or performance upgrades.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Synchromax be used in 2-cycle motorcycle gearboxes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Synchromax is suitable for many 2-cycle motorcycle gearboxes, but always verify the manufacturer's recommended fluid specifications first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many quarts are included in the 01512 set?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 01512 package contains four 1-quart bottles, ideal for multiple services or keeping spares.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55161255199063,"sku":"B074W8FSVG","price":118.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-synchromax-front-packaging.jpg?v=1790323329"},{"product_id":"royal-purple-max-gear-75w-140-synthetic-gear-lube-pack-of-3-quarts-hypoid-limited-slip-protection","title":"Royal Purple Max-Gear 75W-140 Synthetic Gear Lube — Pack of 3 Quarts, Hypoid \u0026 Limited-Slip Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max-Gear 75W-140 is a fully synthetic hypoid gear lubricant formulated to protect heavily loaded differentials and gear sets while improving driveline efficiency.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis three-quart pack of Royal Purple Max-Gear 01301 supplies a high-performance 75W-140 viscosity gear oil designed for demanding automotive and heavy-duty applications. Built on premium synthetic base stocks and Royal Purple’s Synerlec proprietary friction-modifying additive package, this formula prioritizes wear protection, rust resistance, and consistent film strength under extreme pressure. It’s intended for gearboxes, axles, limited-slip differentials, and other hypoid gear systems where heavy loads and high temperatures are common.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max-Gear 75W-140 protect gears under heavy loads?\u003c\/h3\u003e\n\u003cp\u003eMax-Gear uses robust synthetic base oils and a proprietary additive system to maintain a strong lubricating film where gears contact most intensely. That film reduces metal-to-metal contact, helps prevent scoring and pitting, and resists breakdown at high operating temperatures.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExtreme-pressure additives form a protective boundary layer on gear tooth surfaces\u003c\/li\u003e\n  \u003cli\u003eSynthetic viscosity stability sustains film strength across temperature swings\u003c\/li\u003e\n  \u003cli\u003eSynerlec technology helps reduce friction and wear during shock loading\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this lubricant help prevent rust and corrosion inside differentials?\u003c\/h3\u003e\n\u003cp\u003eYes. The formulation includes corrosion inhibitors that shield internal components from moisture and acidic by-products. That protective chemistry helps extend service intervals and reduces the chance of surface degradation in both daily driving and storage conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion inhibitors coat metal surfaces to block rust formation\u003c\/li\u003e\n  \u003cli\u003eFoam control and anti-oxidants preserve lubricant integrity over time\u003c\/li\u003e\n  \u003cli\u003eStable chemistry minimizes sludge and deposit formation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Max-Gear compatible with limited-slip differentials and other driveline systems?\u003c\/h3\u003e\n\u003cp\u003eMax-Gear’s additive package is suitable for many limited-slip and conventional differentials, providing the necessary friction characteristics for clutch-type systems when specified. Always consult your vehicle’s owner manual or service guide to confirm compatibility and any requirement for friction modifiers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for hypoid and spiral bevel gears commonly found in axles\u003c\/li\u003e\n  \u003cli\u003eWorks in many limited-slip setups though vehicle specs should be checked\u003c\/li\u003e\n  \u003cli\u003eSuitable across a range of automotive and light-commercial applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does buying the 3-quart pack benefit routine maintenance?\u003c\/h3\u003e\n\u003cp\u003eA three-quart pack gives you enough volume for many passenger-car differentials or partial fills in light-truck applications, reducing the need to purchase single quarts for each service. Keeping a multi-quart supply on hand simplifies scheduled fluid changes and helps ensure you always use a consistent, high-quality lubricant.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConvenient quantity for multiple services or topping off gearboxes\u003c\/li\u003e\n  \u003cli\u003eConsistent oil across services reduces cross-contamination risks\u003c\/li\u003e\n  \u003cli\u003eBulk packaging often saves time and can be more cost-effective\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Royal Purple Max-Gear 75W-140 is aimed at car enthusiasts, professional mechanics, fleet operators, and owners of trucks or SUVs who need a resilient synthetic gear oil for high-load, high-temperature gear environments. If you service differentials, axles, or limited-slip systems and want a top-tier synthetic option with proven rust protection and wear reduction, this product delivers a dependable choice. Always verify vehicle requirements and change intervals in the manufacturer documentation before use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Royal Purple Max-Gear 75W-140 be used in limited-slip differentials?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Often yes, but check your vehicle manual first; some limited-slip systems may require a specific friction modifier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many quarts are included in this pack?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This listing contains three quarts of Royal Purple Max-Gear 75W-140 synthetic gear oil.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55161272303959,"sku":"B07FGWW98X","price":111.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-gear-front-packaging.jpg?v=1790323651"},{"product_id":"royal-purple-hmx-sae-5w-30-high-mileage-synthetic-motor-oil-1-quart-seal-reviving-anti-wear-formula","title":"Royal Purple HMX SAE 5W-30 High-Mileage Synthetic Motor Oil — 1 Quart, Seal-Reviving Anti-Wear Formula","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HMX SAE 5W-30 is a high-mileage synthetic motor oil formulated to reduce wear, rejuvenate seals, and help restore performance in engines with 75,000+ miles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eAs engines accumulate miles, internal seals harden, deposits form, and oil consumption and wear often increase. Royal Purple HMX SAE 5W-30 combines a fortified anti-wear chemistry with the brand’s Synerlec additive system and detergents created to clean deposits, improve film strength, and help recover lost seal elasticity. The result is a lubricant engineered to address the specific needs of high-mileage gasoline passenger cars and light trucks while supporting longer drain intervals in properly maintained engines.\u003c\/p\u003e\n\n\u003ch3\u003eHow does HMX protect older engines during start-up and normal driving?\u003c\/h3\u003e\n\u003cp\u003eHMX uses Synerlec technology and increased zinc\/phosphorus anti-wear agents to form a strong lubricating film that lowers metal-to-metal contact at critical moments like cold starts. This film strength helps reduce friction and wear immediately, protecting bearings, cam lobes, and other wear-prone surfaces.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnhanced film strength reduces friction under load.\u003c\/li\u003e\n  \u003cli\u003eHigh zinc\/phosphorus content adds anti-wear protection.\u003c\/li\u003e\n  \u003cli\u003eIonic attraction helps the oil cling to metal surfaces at start-up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan HMX help with oil consumption and hardened seals?\u003c\/h3\u003e\n\u003cp\u003eHMX includes chemical ingredients formulated to soften and revitalize seals that have become brittle with age, which can help reduce leaks and oil consumption. By restoring some flexibility to seal materials, the oil aims to improve sealing performance without requiring mechanical repair in many cases.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSeal-restoring additives work to recover lost elasticity.\u003c\/li\u003e\n  \u003cli\u003eReduced oil consumption and fewer visible leaks when seals respond.\u003c\/li\u003e\n  \u003cli\u003eSuitable for engines showing age-related seal hardening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat cleaning and longevity benefits does HMX provide?\u003c\/h3\u003e\n\u003cp\u003eBuilt-in detergents and dispersants remove sludge and deposits accumulated over years of operation, helping restore cleaner oil flow and combustion chamber cleanliness. HMX’s oxidation resistance helps oil resist breakdown, supporting recommended extended drain practices when used with proper filtration in mechanically sound engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStout detergents lift and suspend engine deposits for removal.\u003c\/li\u003e\n  \u003cli\u003eOxidation resistance extends stable oil life under heat stress.\u003c\/li\u003e\n  \u003cli\u003eDesigned for up to 15,000-mile or 12-month drain intervals when conditions allow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I switch to HMX and what engine types is it for?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple recommends two preliminary cleanup drains of about 3,000 miles each using HMX to clear deposits before moving to extended drain intervals. HMX is formulated for gasoline passenger cars and light trucks with more than 75,000 miles and meets API SJ, SL, SM and SN service categories.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerform two 3,000-mile cleanup drain intervals first.\u003c\/li\u003e\n  \u003cli\u003eIntended for unmodified, mechanically sound gasoline engines.\u003c\/li\u003e\n  \u003cli\u003eCompatible with engines calling for SAE 5W-30 within the listed API specs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple HMX SAE 5W-30 is aimed at owners and technicians caring for higher-mileage gasoline cars and light trucks who want to reduce wear, address oil consumption and deposits, and potentially extend drain intervals when the engine is mechanically healthy and proper filtration is used. It’s not a substitute for required mechanical repairs but can be a performance-oriented lubricant choice for revitalizing older engines.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple HMX 5W-30 safe for engines over 75,000 miles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. HMX is formulated specifically for engines beyond 75,000 miles to reduce wear, restore seals, and remove deposits when used in mechanically sound gasoline cars and light trucks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can HMX extend oil drain intervals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Potentially. With proper filtration and engine condition, HMX can support drain intervals up to 15,000 miles or 12 months after initial cleanup drains.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55162306789719,"sku":"B00G3BRNLE","price":30.25,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-hmx-5w30-front-quart.jpg?v=1790335921"},{"product_id":"royal-purple-synthetic-motor-oil-0w-40-bq-1-qt-full-synthetic-gm-dexos1-approval","title":"Royal Purple synthetic motor oil 0W-40 BQ 1-qt — full synthetic, GM dexos1 approval","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple 0W-40 BQ synthetic motor oil in a 1-quart bottle is a premium API-licensed engine oil formulated to protect moving parts, support fuel efficiency, and maintain emissions system health.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned from high-quality base stocks and Royal Purple’s proprietary additive package, this 0W-40 grade delivers wide-temperature flow, strong wear protection, and compatibility with modern gasoline engines. It meets current API and ILSAC standards and carries GM dexos1* approval for gasoline applications, making it suitable for many late-model vehicles that require a robust synthetic multi-grade oil.\u003c\/p\u003e\n\n\u003ch3\u003eHow does 0W-40 BQ help protect engines at high and low temperatures?\u003c\/h3\u003e\n\u003cp\u003eThis viscosity flows easily at cold starts and maintains a stable lubricating film at high operating temperatures, reducing metal-to-metal contact. The formulation lowers friction while resisting breakdown so your engine components stay protected across a broad temperature range.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLow-temperature fluidity for fast cold-start oiling\u003c\/li\u003e\n  \u003cli\u003eHigh-temperature shear stability to preserve viscosity\u003c\/li\u003e\n  \u003cli\u003eEnhanced anti-wear additives to reduce component wear\u003c\/li\u003e\n  \u003cli\u003eImproved thermal protection for sustained high-RPM use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Royal Purple 0W-40 BQ compatible with other motor oils and vehicle warranties?\u003c\/h3\u003e\n\u003cp\u003eYes — this oil is designed to mix safely with conventional and synthetic oils without special procedures. It carries API and ILSAC licensing and meets Dexos1* requirements, aligning it with many OEM warranty specifications when used in approved viscosity grades.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with mineral and synthetic oil bases\u003c\/li\u003e\n  \u003cli\u003eAPI-licensed and ILSAC-compliant performance\u003c\/li\u003e\n  \u003cli\u003eGM dexos1* approval for gasoline engines where specified\u003c\/li\u003e\n  \u003cli\u003eNo special flushing required when switching, beyond normal service practices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill switching to Royal Purple 0W-40 BQ improve fuel economy or emissions equipment life?\u003c\/h3\u003e\n\u003cp\u003eThe low coefficient of friction in this formulation can contribute to modest fuel-economy benefits versus higher-friction oils, and the additive package is tuned to help protect catalytic emission systems. While improvements vary by vehicle and driving conditions, the oil helps reduce factors that can harm exhaust catalysts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReduced internal friction for potential fuel savings\u003c\/li\u003e\n  \u003cli\u003ePatented ZDDP-containing chemistry to support catalyst longevity\u003c\/li\u003e\n  \u003cli\u003eImproved tolerance for ethanol-containing fuels to limit sludge\u003c\/li\u003e\n  \u003cli\u003eSuperior corrosion inhibitors to protect engine internals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple 0W-40 BQ in 1-quart bottles is aimed at drivers and technicians who want a high-quality synthetic multi-grade oil for modern gasoline engines that require broad temperature performance and API\/ILSAC credentials. It’s a good choice for owners of performance cars, daily drivers in varied climates, and anyone seeking an API-licensed synthetic that supports emission systems and fuel efficiency. For new engines, follow manufacturer recommendations—Royal Purple suggests waiting until the manufacturer’s first scheduled oil change or a minimum mileage interval before switching to ensure proper engine break-in. For high-mileage engines, gradual adaptation with several shorter drain intervals can allow the oil’s solvency to clean deposits safely. Avoid switching if your engine has unresolved excessive oil consumption or damaged seals until those issues are addressed.\u003c\/p\u003e\n\n\u003cp\u003eFeatures:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBetter wear protection\u003c\/li\u003e\n  \u003cli\u003eIncreased protection against LSPI\u003c\/li\u003e\n  \u003cli\u003eIncreased fuel efficiency\u003c\/li\u003e\n  \u003cli\u003eBetter protection for vehicle exhaust emissions equipment\u003c\/li\u003e\n  \u003cli\u003eImproved compatibility with fuels containing ethanol\u003c\/li\u003e\n  \u003cli\u003eSuperior corrosion protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix Royal Purple 0W-40 BQ with my current oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is compatible with conventional and synthetic oils, so you can mix or switch without special procedures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: When should I switch to Royal Purple in a new vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Wait until the manufacturer’s first scheduled oil change or the minimum mileage recommended by the vehicle maker before switching.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55162830913879,"sku":"B002KD0M8A","price":31.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-bottle.jpg?v=1790339196"},{"product_id":"royal-purple-max-cycle-10w-40-synthetic-motorcycle-oil-1-quart-wet-clutch-protection-high-temp-stability","title":"Royal Purple Max Cycle 10W-40 Synthetic Motorcycle Oil, 1 Quart — Wet-Clutch Protection \u0026 High-Temp Stability","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max Cycle 10W-40 is a full-synthetic motorcycle oil engineered to protect high-stress 4-cycle engines and wet-clutch transmissions while improving performance and cleanliness.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for riders and mechanics who demand dependable lubrication under heat, load and frequent operation, Max Cycle combines a wide-temperature SAE 10W-40 viscosity with Royal Purple's Synerlec additive technology. It works in both air-cooled and liquid-cooled 4-stroke engines and meets or exceeds API and JASO warranty requirements, offering compatibility with conventional and other synthetic oils so you can switch without a flush.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max Cycle protect engines and transmissions under heavy use?\u003c\/h3\u003e\n\u003cp\u003eMax Cycle uses a robust additive package to reduce metal-to-metal contact, fight deposit formation and resist viscosity breakdown at elevated temperatures. That means reduced wear on bearings and gears plus a cleaner internal environment for consistent performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynerlec additive boosts film strength for better surface protection.\u003c\/li\u003e\n  \u003cli\u003eFull-synthetic base stock resists thermal shear during long runs.\u003c\/li\u003e\n  \u003cli\u003eOutstanding rust and corrosion protection extends component life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work with my wet-clutch motorcycle and mixed oils?\u003c\/h3\u003e\n\u003cp\u003eYes—Max Cycle is formulated for wet-clutch applications and is compatible with other motor oils, both mineral and synthetic. It meets modern JASO standards for clutch compatibility, so shifting feel and clutch engagement remain predictable.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eJASO-compliant for safe wet-clutch operation.\u003c\/li\u003e\n  \u003cli\u003eMixable with existing oils; no mandatory engine flush required before switching.\u003c\/li\u003e\n  \u003cli\u003eFit type: vehicle specific—always confirm the correct SAE weight for your bike in the owner's manual.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance advantages should I expect from a 10W-40 full synthetic?\u003c\/h3\u003e\n\u003cp\u003eSAE 10W-40 delivers reliable cold-start flow while maintaining thicker protection at operating temperature, making it a versatile choice across climates and ride styles. The full-synthetic formulation enhances lubrication consistency, helps reduce fuel-robbing friction and supports engine cleanliness under sustained loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10W cold-grade helps faster oil circulation at startup.\u003c\/li\u003e\n  \u003cli\u003e40 high-temp grade sustains a protective film during normal operation.\u003c\/li\u003e\n  \u003cli\u003eTypically improves wear protection and can support better efficiency versus conventional oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there safety or handling details I should know?\u003c\/h3\u003e\n\u003cp\u003eMax Cycle has a high flash point (about 204°C), indicating thermal stability in normal service. Standard safe-handling practices apply: store in a cool, dry place, avoid open flames, and recycle used oil according to local regulations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFlash point ~204°C suggests strong heat resistance.\u003c\/li\u003e\n  \u003cli\u003eDispose of used oil responsibly at authorized collection points.\u003c\/li\u003e\n  \u003cli\u003eCompatible with routine service intervals—refer to your service manual for change frequency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple Max Cycle 10W-40 is suited to motorcycle owners, track-day riders, touring cyclists and mechanics who need a dependable full-synthetic oil that supports wet-clutch systems, performs across a wide temperature range and simplifies service with cross-compatibility to other oils. If you want stronger film strength, cleaner internals and a product designed for high-stress 4-cycle engines, Max Cycle is built for that use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple Max Cycle safe for wet-clutch motorcycles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Max Cycle meets JASO standards and is formulated for wet-clutch compatibility without causing slip.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix Max Cycle with my current oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is compatible with mineral and synthetic oils, so you can mix or switch without a mandatory flush.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55162876690775,"sku":"B000E2D6PK","price":34.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-cycle-front-quart.jpg?v=1790339435"},{"product_id":"royal-purple-purple-ice-radiator-additive-12-oz-lowers-coolant-temp-corrosion-protection","title":"Royal Purple Purple Ice Radiator Additive 12 oz — Lowers Coolant Temp, Corrosion Protection","description":"\u003cp\u003e\u003cstrong\u003ePurple Ice is a concentrated radiator conditioner that lowers coolant temperatures and adds corrosion protection when used with antifreeze or straight water systems.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRoyal Purple Purple Ice is a synthetic radiator additive formulated to improve heat transfer and protect pressurized cooling systems. By reducing surface tension and helping keep coolant pathways clean, it assists the coolant in shedding heat more efficiently and helps protect water pump seals and metal surfaces. Suitable for use with traditional green silicate glycol antifreeze as well as modern OAT\/HOAT formulas, Purple Ice is intended for passenger vehicles, performance cars, and racing applications where improved cooling is desired.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Purple Ice reduce engine and coolant temperatures?\u003c\/h3\u003e\n\u003cp\u003ePurple Ice contains a wetting agent that lowers the surface tension of the coolant so heat moves from metal surfaces into the coolant more readily. This enhanced heat transfer can reduce hot spots in the engine and improve overall thermal control without changing antifreeze freeze\/boil points.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWetting agent reduces coolant surface tension for faster heat transfer.\u003c\/li\u003e\n  \u003cli\u003eHelps dissipate localized hot spots on cylinder heads and engine blocks.\u003c\/li\u003e\n  \u003cli\u003eCompatible with water or coolant\/water mixes to boost cooling efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill Purple Ice work with my car’s antifreeze?\u003c\/h3\u003e\n\u003cp\u003ePurple Ice is designed to be compatible with all common factory and aftermarket antifreeze types, including traditional ethylene glycol and newer OAT\/HOAT chemistries. It can be used with a 50\/50 antifreeze\/water mix or in straight water systems commonly found in racing, following recommended dosing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSafe with green silicate-based and OAT\/HOAT antifreezes (e.g., Dex-Cool, Ford, Chrysler formulas).\u003c\/li\u003e\n  \u003cli\u003eUse 1 oz per quart of coolant capacity for a 50\/50 mix.\u003c\/li\u003e\n  \u003cli\u003eUse 2 oz per quart for straight water racing systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow often should I add Purple Ice and are there special instructions?\u003c\/h3\u003e\n\u003cp\u003eTo maintain the product’s cooling and protection benefits, add Purple Ice on a scheduled basis: annually or at the recommended mileage interval. Always shake the bottle well and ensure the cooling system is free of blockages or heavy corrosion before adding.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdd once a year or every 30,000 miles with antifreeze\/water mixes.\u003c\/li\u003e\n  \u003cli\u003eFor straight water systems, add once a year or every 15,000 miles.\u003c\/li\u003e\n  \u003cli\u003eDrain and flush the system before switching from other cooling additives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Purple Ice safe to use with other cooling additives or stop-leak products?\u003c\/h3\u003e\n\u003cp\u003ePurple Ice should not be mixed with other heat-transfer or wetting-enhancing additives—if another such product has been used, flush the system first. It can be used alongside leak-stop additives, though those products may coat interior surfaces and reduce Purple Ice’s effectiveness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAvoid combining with other wetting agents; flush if previously used.\u003c\/li\u003e\n  \u003cli\u003eCompatible with leak-stopping additives, but expect reduced heat-transfer gains if surfaces are coated.\u003c\/li\u003e\n  \u003cli\u003eDoes not fix pre-existing mechanical cooling system failures—address those separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Purple Ice is aimed at drivers and technicians who want to lower coolant temperatures, reduce hot spots, and add corrosion resistance without changing antifreeze chemistry. It’s a practical option for daily drivers seeking improved thermal management, performance enthusiasts and racers using straight water systems, and fleet or service shops that maintain pressurized cooling systems. Note that Purple Ice does not provide freeze protection—use it alongside appropriate antifreeze where winters demand it.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Purple Ice with any antifreeze?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Purple Ice is compatible with traditional ethylene glycols and modern OAT\/HOAT antifreezes; follow recommended mixing ratios.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much Purple Ice do I add to my radiator?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use 1 oz per quart of coolant for a 50\/50 mix; use 2 oz per quart for straight water (racing) systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55164144451927,"sku":"B000BRGAJ2","price":31.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-purple-ice-front-label.jpg?v=1790350752"},{"product_id":"royal-purple-hp-2-c-synthetic-2-stroke-oil-1-qt-high-performance-premix-racing-formula-low-deposit-protection","title":"Royal Purple HP 2-C Synthetic 2-Stroke Oil 1 qt — High-Performance premix racing formula, low-deposit protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple ROY01311 HP 2-C is a full-synthetic 2-cycle engine oil engineered for high-performance premix racing engines to improve power delivery while minimizing deposits and wear.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for competitive and enthusiast two-stroke applications, this Royal Purple XPR 2-C formula replaces older TCW III racing blends with a synthetic solvency system that helps keep combustion chambers, spark plugs, and exhaust ports cleaner than conventional 2-stroke oils. It’s intended for premix gasoline 2-cycle engines commonly found in racing motorcycles, karting, personal watercraft, and other high-revving small engines where maximizing horsepower and reliability matters. Note: Royal Purple does not recommend using this product with stock oil-injection systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Royal Purple 2-C improve engine performance?\u003c\/h3\u003e\n\u003cp\u003eThis lubricant reduces friction and helps control internal temperatures so engines can operate at higher speed and torque with less mechanical drag. Its synthetic base and additive package are selected to promote clean combustion and minimize the build-up that robs power.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLow coefficient of friction to help increase horsepower and throttle response\u003c\/li\u003e\n  \u003cli\u003eSynthetic solvency that resists deposit formation on spark plugs and exhaust ports\u003c\/li\u003e\n  \u003cli\u003eFormulated for high-rpm racing loads to reduce heat and wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat applications and engine types is this 2-stroke oil best suited for?\u003c\/h3\u003e\n\u003cp\u003eROY01311 HP 2-C is made for premix 2-cycle gasoline engines used in racing and performance settings rather than OEM oil-injection systems. It’s ideal where intake and exhaust cleanliness and sustained high-rpm protection are priorities.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRacing motorcycles, dirt bikes, and sprint karts using premix fueling\u003c\/li\u003e\n  \u003cli\u003eHigh-performance marine outboards and personal watercraft run in premix mode\u003c\/li\u003e\n  \u003cli\u003eAny two-stroke small engine in competitive or heavy-duty use where synthetic benefits are desired\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I mix and use this premium 2-cycle oil?\u003c\/h3\u003e\n\u003cp\u003eFollow the engine or vehicle manufacturer’s recommended fuel-to-oil ratio for premix engines, or the tuning guidance used for your racing setup. Always use fresh, properly measured fuel mixtures and avoid using this product in systems the maker prohibits, such as stock automatic injection systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMix oil and gasoline thoroughly at the specified premix ratio for your engine\u003c\/li\u003e\n  \u003cli\u003eStore in a cool, dry place away from ignition sources and follow local disposal rules\u003c\/li\u003e\n  \u003cli\u003eConsult the vehicle manual and Royal Purple guidance before switching lubricant types\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil affect exhaust appearance or spark plug life?\u003c\/h3\u003e\n\u003cp\u003eIts solvent-rich synthetic formulation helps keep combustion deposits low, which can reduce fouling and maintain a cleaner exhaust and spark plug condition over time compared with many conventional 2-cycle oils. Results vary by engine condition, mixture ratio, and operating style.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCleaner spark plugs and exhaust ports promote consistent ignition and combustion\u003c\/li\u003e\n  \u003cli\u003eLess carbon build-up can help maintain peak engine speed and responsiveness\u003c\/li\u003e\n  \u003cli\u003ePerformance gains depend on correct premix ratios and maintenance practices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: This product is aimed at racers, performance riders, and mechanics who run manually premixed two-stroke gasoline engines and want a full-synthetic oil designed to prioritize power, cleanliness, and wear protection under high loads. It’s not intended for stock oil-injection setups; if your equipment relies on automatic injection, choose a product approved by the engine manufacturer instead. Follow all manufacturer recommendations when changing lubricants or fuel\/oil ratios to ensure reliable operation and compliance with warranty or racing rules.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFor best results, follow your vehicle owner’s manual recommendations.\u003c\/li\u003e\n  \u003cli\u003ePackage dimensions: 10 L x 5 W x 2 H (inches); package weight: 1.7 pounds.\u003c\/li\u003e\n  \u003cli\u003eMade in USA.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this oil in an oil-injection two-stroke system?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Royal Purple recommends ROY01311 HP 2-C for premix systems only, not stock oil-injection setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil help reduce spark plug fouling?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Its synthetic solvency is formulated to keep spark plugs and exhaust ports cleaner than many conventional 2-stroke oils.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55165565403479,"sku":"B000BPZ824","price":31.63,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-roy01311-front-label.jpg?v=1790355691"},{"product_id":"royal-purple-synchromax-synthetic-manual-transmission-fluid-1-quart-low-viscosity-enhanced-shift-feel","title":"Royal Purple Synchromax Synthetic Manual Transmission Fluid 1 Quart — Low-Viscosity, Enhanced Shift Feel","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Synchromax is a synthetic, light-viscosity transmission fluid engineered to improve shift feel and protect gears in manual transmissions, transfer cases, and certain motorcycle gearboxes.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned by Royal Purple using its Synerlec additive technology, Synchromax is formulated to meet applications that call for automatic-transmission fluids or lighter gear oils. It works across a broad temperature range to reduce gear noise, improve synchronizer performance, and resist oxidation and corrosion while remaining gentle on soft synchronizer metals and all common friction materials.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Synchromax improve shifting in manual transmissions?\u003c\/h3\u003e\n\u003cp\u003eSynchromax combines a low-viscosity synthetic base with Royal Purple’s proprietary Synerlec additives to deliver smoother, more consistent shifts. The formula reduces friction variations between synchronizer surfaces and gears so shifts feel crisper and more predictable in varied temperatures.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynerlec additive package improves synchronizer engagement\u003c\/li\u003e\n  \u003cli\u003eStable viscosity over temperature reduces shift hesitation\u003c\/li\u003e\n  \u003cli\u003eCompatible with common synchronizer friction materials for consistent feel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I use Synchromax in transfer cases and motorcycle gearboxes?\u003c\/h3\u003e\n\u003cp\u003eYes — Synchromax is suitable for transfer cases and two-stroke motorcycle gearboxes that specify light-viscosity lubricants or automatic-transmission fluids. Its formulation protects gears and bearings while maintaining the low shear properties those applications require.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended where ATF or light-gear oil is specified\u003c\/li\u003e\n  \u003cli\u003eProvides wear protection for gears and bearings\u003c\/li\u003e\n  \u003cli\u003eMaintains performance in both cold starts and high-load conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat protection against wear, corrosion, and oxidation does Synchromax provide?\u003c\/h3\u003e\n\u003cp\u003eSynchromax offers elevated wear protection and long-term stability thanks to its synthetic base and advanced additives. The product helps prevent metal-to-metal contact, slows oxidation-related viscosity change, and resists corrosive attack on internal components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnhanced wear protection to extend gear life\u003c\/li\u003e\n  \u003cli\u003eOxidation resistance preserves fluid performance over time\u003c\/li\u003e\n  \u003cli\u003eCorrosion inhibitors protect internal metal surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Synchromax compatible with my transmission's materials and seals?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple formulated Synchromax to be compatible with a broad range of friction materials and the soft metals often found in synchronizers, so it won’t interfere with clutch or synchronizer operation. It is suitable for mixed-material systems commonly found in modern and classic vehicles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorks with most synchronizer friction compounds without glazing\u003c\/li\u003e\n  \u003cli\u003eSafe for soft metals used in synchronizer construction\u003c\/li\u003e\n  \u003cli\u003eNo adverse effects on typical transmission seals when used as specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple Synchromax is aimed at vehicle owners, mechanics, and riders who need a high-performance, light-viscosity lubricant for manual transmissions, transfer cases, or 2-cycle motorcycle gearboxes. It’s a good choice for those seeking improved shift feel, quieter gear operation, and long-lasting protection without changing synchronizer characteristics. Check your owner’s manual for compatibility with ATF or light-gear oil specifications before use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Synchromax replace manual transmission oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, when your manual transmission specifies ATF or light-viscosity oil; check the vehicle manual for approved fluid types.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Synchromax safe for synchronizers and soft metals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it’s formulated to be compatible with common friction materials and soft synchronizer metals without harming performance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55166324932951,"sku":"B001DKTG0G","price":35.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-synchromax-front-label.jpg?v=1790366891"},{"product_id":"royal-purple-max-gear-75w-90-synthetic-gear-oil-1-quart-high-performance-gl-5-gl-4-protection-reduced-noise","title":"Royal Purple Max Gear 75W-90 Synthetic Gear Oil, 1 Quart — High-Performance GL-5\/GL-4 Protection, Reduced Noise","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max Gear 75W-90 is a high-performance synthetic gear oil formulated to protect heavily loaded differentials and manual transmissions while improving smoothness and reducing noise and heat.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMax Gear pairs a premium synthetic base oil with Royal Purple’s Synerlec additive technology to deliver enhanced wear protection and reliable friction characteristics for hypoid gears. This 75W-90 viscosity is suitable for a wide range of automotive, light truck, RV, and marine lower-gear applications that call for API GL-5 or GL-4 fluids. It’s engineered to resist thermal breakdown, guard against pitting and scoring, and maintain consistent film strength under heavy loads.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max Gear 75W-90 protect heavily loaded gears?\u003c\/h3\u003e\n\u003cp\u003eMax Gear’s synthetic base and Synerlec additive package create a durable lubricating film that reduces metal-to-metal contact, lowering wear even under high torque and pressure. The formulation resists oxidation and shear, keeping viscosity stable over extended service intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh film strength for hypoid and spiral-bevel gears\u003c\/li\u003e\n  \u003cli\u003eSynerlec additive reduces friction and wear\u003c\/li\u003e\n  \u003cli\u003eResists thermal degradation for longer oil life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this work in my differential, manual transmission, or marine lower gear unit?\u003c\/h3\u003e\n\u003cp\u003eYes — Max Gear 75W-90 is suitable for front and rear differentials, manual transmissions, and lower gear units in marine engines that specify API GL-5 or GL-4. It includes the hypoid friction modifiers needed for clutch or cone-type differentials, so no extra additives are required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets API GL-5\/GL-4 compatibility requirements\u003c\/li\u003e\n  \u003cli\u003eFormulated for hypoid gear sets and limited-slip differentials\u003c\/li\u003e\n  \u003cli\u003eRecommended for trucks, motor homes, passenger cars, and marine lower gears\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect on the road or at sea?\u003c\/h3\u003e\n\u003cp\u003eDrivers typically notice smoother shifting, reduced gear rattle, and lower operating temperatures due to improved lubrication and friction control. The oil helps extend component life and maintain efficiency under repeated heavy loads and long drives.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmoother, quieter gear operation in daily and towing use\u003c\/li\u003e\n  \u003cli\u003eReduced gear and bearing wear for longer service life\u003c\/li\u003e\n  \u003cli\u003eImproved stability across temperature ranges for consistent performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I choose and use Max Gear 75W-90 for best results?\u003c\/h3\u003e\n\u003cp\u003eSelect the 75W-90 grade when your vehicle owner’s manual or service instructions call for that viscosity and API GL-5\/GL-4 designation. Pour directly into the differential or transmission fill point, observe manufacturer fill volumes, and replace according to service intervals or after heavy-duty use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm compatibility with your vehicle’s owner manual before use\u003c\/li\u003e\n  \u003cli\u003eNo extra friction modifiers or additives are required\u003c\/li\u003e\n  \u003cli\u003eFollow recommended fill volumes and service intervals for peak protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Royal Purple Max Gear 75W-90 is aimed at owners of cars, light trucks, RVs, and marine vessels seeking a durable synthetic gear oil that improves gear life and quiets noisy differentials. It’s a practical upgrade for drivers who tow, haul, or regularly operate under heavy-load conditions and for anyone wanting a higher-performance alternative to conventional gear oils.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eFor best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.\u003c\/li\u003e\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple Max Gear 75W-90 compatible with GL-5 specifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This product meets API GL-5 (and GL-4 compatibility) and is formulated for hypoid gears and many limited-slip differentials.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need extra additives when using Max Gear 75W-90?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Max Gear includes the necessary friction modifiers and Synerlec additives, so no additional gear oil additives are required.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55166961353047,"sku":"B0007QGT34","price":35.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-gear-75w-90-front-quart.jpg?v=1790373475"},{"product_id":"royal-purple-hps-10w-40-synthetic-motor-oil-1-quart-high-performance-synerlec-anti-wear","title":"Royal Purple HPS 10W-40 Synthetic Motor Oil — 1 Quart High-Performance, Synerlec Anti-Wear","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple 31140 HPS 10W-40 is a fully synthetic, high-performance motor oil formulated with Synerlec and elevated zinc\/phosphorus to protect and optimize modified and high-output street engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for drivers who demand stronger protection and measurable performance gains, this 1-quart bottle of Royal Purple HPS 10W-40 offers a synthetic basestock and a proprietary additive package designed to reduce wear, improve thermal stability, and maintain oil film under increased loads. It’s intended for vehicles where owners want better-than-stock protection without reverting to race-only fluids.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Royal Purple HPS 10W-40 help protect engines under high stress?\u003c\/h3\u003e\n\u003cp\u003eHPS 10W-40 uses Synerlec, a proprietary friction-modifying additive that strengthens the oil’s protective film at metal-to-metal contact points. Combined with a high level of zinc\/phosphorus anti-wear chemistry, it reduces wear in high-pressure areas like cam lobes, lifters, and bearings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProprietary Synerlec increases film strength under load.\u003c\/li\u003e\n  \u003cli\u003eElevated zinc\/phosphorus provides targeted anti-wear protection.\u003c\/li\u003e\n  \u003cli\u003eViscosity response to pressure preserves oil film during heavy throttle and towing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect from switching to this 10W-40 synthetic?\u003c\/h3\u003e\n\u003cp\u003eSwitching to HPS 10W-40 can improve mechanical efficiency and help maintain horsepower and torque in tuned or older engines. Its synthetic formulation enhances oxidation resistance, which helps the oil resist breakdown at higher temperatures and extend effective service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePotential for better horsepower and torque retention under load.\u003c\/li\u003e\n  \u003cli\u003eImproved oxidation stability for longer-lasting protection.\u003c\/li\u003e\n  \u003cli\u003eMaintains controlled viscosity across operating temperatures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this oil appropriate for my vehicle and when should it be used?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple HPS 10W-40 is formulated for high-performance street and modified engines and is often chosen by owners of vehicles no longer covered by manufacturer warranty. Check your owner’s manual for recommended SAE grades; this 10W-40 is suitable when that viscosity is specified or when higher film strength is desired for worn or upgraded engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended for performance, modified, or older engines requiring 10W-40.\u003c\/li\u003e\n  \u003cli\u003eSuitable when extra anti-wear protection is needed beyond OEM oils.\u003c\/li\u003e\n  \u003cli\u003eNot restricted to race use—designed for street-driven vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does HPS compare to other synthetics and what maintenance considerations apply?\u003c\/h3\u003e\n\u003cp\u003eHPS is engineered to outperform many conventional and synthetic oils in wear protection and stability thanks to its additive blend, but like all high-performance oils it may cost more than mainstream synthetics. Follow regular oil change intervals based on driving conditions and monitor oil condition when using high-performance formulations in high-mileage engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStronger anti-wear package than many base-line synthetics.\u003c\/li\u003e\n  \u003cli\u003eMay improve oil life under severe conditions, but follow interval recommendations.\u003c\/li\u003e\n  \u003cli\u003eAvailable in multiple viscosities for broad vehicle compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple 31140 HPS 10W-40 is aimed at enthusiasts, performance-minded drivers, and owners of modified or aging engines seeking elevated protection and stability. If you need a synthetic oil that emphasizes anti-wear chemistry, thermal resilience, and the possibility of improved mechanical efficiency while preserving street drivability, this HPS bottle is built for that use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Royal Purple HPS 10W-40 in a vehicle under warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: HPS is generally recommended for vehicles no longer under warranty; check your warranty terms and owner’s manual before switching.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change this synthetic oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Follow manufacturer intervals or more frequent changes under severe driving; HPS improves stability but still needs routine monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55167049826647,"sku":"B005JVHI7S","price":37.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-31140-front-label.jpg?v=1790375703"},{"product_id":"royal-purple-max-gear-75w-140-synthetic-gear-oil-quart-6-pack-limited-slip-protection-high-temp-film-strength","title":"Royal Purple MAX GEAR 75W-140 Synthetic Gear Oil Quart 6-Pack — Limited-Slip Protection, High-Temp Film Strength","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple MAX GEAR 75W-140 is a fully synthetic gear oil with limited-slip additive formulated to protect modern differentials and manual transmissions under heavy load.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis high-viscosity synthetic gear lubricant delivers robust protection for hypoid gears and limited-slip units in cars, trucks, SUVs, and performance vehicles. Packaged as 1-quart bottles sold in a convenient 6-bottle set, it’s designed to maintain film strength at high temperatures while providing smooth engagement for limited-slip differentials. Follow your vehicle manufacturer’s recommendations when choosing gear oil viscosity and change intervals.\u003c\/p\u003e\n\n\u003ch3\u003eHow does MAX GEAR 75W-140 protect gears during heavy towing or spirited driving?\u003c\/h3\u003e\n\u003cp\u003eMAX GEAR 75W-140 creates a durable lubricating film that resists breakdown under extreme pressure and heat, reducing wear on hypoid and bevel gears. Its synthetic base and performance additives help preserve gear life when torque and load increase, minimizing metal-to-metal contact.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynthetic base oil for high thermal stability and oxidation resistance\u003c\/li\u003e\n  \u003cli\u003eExtreme-pressure additives to prevent gear scoring and pitting\u003c\/li\u003e\n  \u003cli\u003eStrong film strength to maintain protection under heavy loads\u003c\/li\u003e\n  \u003cli\u003eSuitable for hypoid and heavy-duty gearsets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work in limited-slip differentials without causing chatter?\u003c\/h3\u003e\n\u003cp\u003eYes — Royal Purple MAX GEAR includes a limited-slip additive package that promotes smooth clutch engagement in limited-slip differentials. It helps reduce noisy engagement and provides consistent torque transfer, though compatibility with specific limited-slip designs should be confirmed against your vehicle’s requirements.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFormulated with limited-slip friction modifiers to prevent chatter\u003c\/li\u003e\n  \u003cli\u003eMaintains consistent friction characteristics across temperature ranges\u003c\/li\u003e\n  \u003cli\u003eCompatible with many aftermarket and OEM limited-slip systems (verify with manual)\u003c\/li\u003e\n  \u003cli\u003eImproves traction delivery without sacrificing protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use these 1-quart bottles and why buy the 6-pack?\u003c\/h3\u003e\n\u003cp\u003eEach quart bottle is sized for topping off or servicing differentials and manual transmissions that specify 75W-140 viscosity. The six-bottle pack is ideal for multi-vehicle households, professional shops, or scheduled maintenance where multiple fills are anticipated.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1-quart bottles for single-service or partial fills\u003c\/li\u003e\n  \u003cli\u003eSix-pack reduces purchase frequency and ensures spare supply\u003c\/li\u003e\n  \u003cli\u003eConvenient for fleet maintenance and DIY service intervals\u003c\/li\u003e\n  \u003cli\u003eStore in a cool, dry place and follow disposal regulations for used oil\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect compared to conventional gear oils?\u003c\/h3\u003e\n\u003cp\u003eCompared with conventional mineral-based gear oils, this synthetic 75W-140 offers improved shear stability, better high-temperature protection, and longer-lasting additive performance. That translates into reduced wear, cleaner gear surfaces, and potentially longer drain intervals when used according to manufacturer guidance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGreater resistance to viscosity loss and shear thinning\u003c\/li\u003e\n  \u003cli\u003eImproved thermal and oxidative stability at high operating temperatures\u003c\/li\u003e\n  \u003cli\u003eEnhanced protection for bearings, seals, and gear teeth\u003c\/li\u003e\n  \u003cli\u003eCleaner gear surfaces due to fewer breakdown byproducts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple MAX GEAR 75W-140 in a 6-quart pack is well suited for owners of high-performance cars, towing trucks, off-road vehicles, and mechanics servicing multiple vehicles who need a dependable synthetic gear oil with a limited-slip additive. It’s a practical choice for anyone looking to maintain heavy-duty gearboxes and differentials under demanding driving conditions while keeping spare supply on hand. Always check your vehicle owner’s manual for the recommended viscosity and specifications before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eFor best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.\u003c\/em\u003e\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is MAX GEAR 75W-140 suitable for limited-slip differentials?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it includes a limited-slip additive to reduce chatter, but confirm compatibility with your vehicle’s differential specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many quarts are included in the pack?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The pack contains six 1-quart bottles, ideal for multiple services or fleet maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55167337398615,"sku":"B000J15THO","price":40.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-gear-front-pack.jpg?v=1790383987"},{"product_id":"royal-purple-synthetic-assembly-lubricant-8-oz-load-bearing-film-and-rust-protection-for-rebuilt-parts","title":"Royal Purple Synthetic Assembly Lubricant 8 oz — Load‑Bearing Film and Rust Protection for Rebuilt Parts","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max-Tuff is an 8-ounce synthetic assembly lubricant engineered to form a durable, load-bearing barrier that protects metal surfaces during reassembly and startup.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen you rebuild, repair, or reassemble equipment, the first minutes of operation are critical. Royal Purple Max-Tuff uses advanced synthetic molecules, including Synslide, to cling to metal surfaces and reduce metal-to-metal contact during those vulnerable boundary lubrication periods. The result is reduced wear during initial run-in, plus strong rust and corrosion resistance for both ferrous and non-ferrous components.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max-Tuff protect parts during reassembly?\u003c\/h3\u003e\n\u003cp\u003eMax-Tuff deposits a tenacious, load-bearing film that separates mating surfaces, which lowers the chance of boundary conditions where metal would otherwise contact metal directly. That protective layer supports heavy loads and helps parts slide smoothly together during initial operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdheres to metal for lasting boundary protection\u003c\/li\u003e\n  \u003cli\u003eForms a robust physical barrier under load\u003c\/li\u003e\n  \u003cli\u003eReduces scuffing and wear at initial startup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat surfaces and equipment is it suitable for?\u003c\/h3\u003e\n\u003cp\u003eThis synthetic assembly lubricant works on both ferrous and non-ferrous metals, making it appropriate for a wide range of equipment—gears, shafts, bearings, splines, and threaded fasteners. It’s intended for reassembly after repair or overhaul where temporary, heavy-duty lubrication is required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSafe on steel, aluminum, brass, and other common alloys\u003c\/li\u003e\n  \u003cli\u003eIdeal for rebuilt gearboxes, pumps, and drivetrain components\u003c\/li\u003e\n  \u003cli\u003eUseful for shop repairs, field service, and routine maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do you apply Max-Tuff and what coverage can you expect?\u003c\/h3\u003e\n\u003cp\u003eApply a thin, even layer to cleaned mating surfaces before assembly; a little goes a long way because Synslide molecules bond tightly. The 8-ounce tube\/package is designed for multiple small-to-medium reassembly jobs rather than bulk lubrication.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWipe or solvent-clean surfaces before application for best adhesion\u003c\/li\u003e\n  \u003cli\u003eSpread sparingly to avoid excess buildup that can attract debris\u003c\/li\u003e\n  \u003cli\u003eOne 8 oz container covers numerous small components during shop rebuilds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat corrosion protection does it offer during storage and startup?\u003c\/h3\u003e\n\u003cp\u003eBeyond initial boundary lubrication, Max-Tuff leaves a protective film that helps inhibit rust and corrosion on both ferrous and non-ferrous metals during short-term storage and the critical run-in period. That layer reduces oxidation risk between assembly and first use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProvides temporary rust prevention during storage or transit\u003c\/li\u003e\n  \u003cli\u003eProtects surfaces through the first operational cycles until normal lubrication is established\u003c\/li\u003e\n  \u003cli\u003eHelps maintain clean mating surfaces during handling and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple Max-Tuff is for mechanics, rebuild technicians, and maintenance professionals who need a high-performance assembly lubricant that delivers stubborn adhesion, boundary protection, and temporary corrosion resistance. If you’re reassembling automotive, industrial, or agricultural equipment and want a compact, synthetic solution that reduces startup wear, Max-Tuff is designed for those jobs. Note: use as a reassembly or installation lubricant—replace with the system’s specified operational lubricant when required.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Max-Tuff be used on aluminum parts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Max-Tuff is formulated for both ferrous and non-ferrous metals, including aluminum, providing boundary protection and corrosion resistance during reassembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Should Max-Tuff be replaced by regular lubricant after startup?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Max-Tuff is for assembly and initial run-in protection; switch to the equipment’s recommended operational lubricant for long-term service.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55168329548119,"sku":"B000BRUYSK","price":52.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-tuff-front-label_jpg.jpg?v=1790400410"},{"product_id":"royal-purple-10w-30-synthetic-motor-oil-sae-10w-30-5-quart-api-sn-dexos1-protection","title":"Royal Purple 10W-30 Synthetic Motor Oil — SAE 10W-30 5-Quart, API SN \u0026 Dexos1 protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple 51130 is a 5‑quart, API‑licensed SAE 10W‑30 high‑performance synthetic motor oil engineered to protect engines, improve efficiency, and work with both gasoline and diesel applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt from premium base stocks and Royal Purple’s proprietary additive package, this 10W‑30 formula aims to reduce wear and help engines run cleaner while remaining compatible with conventional and other synthetic oils. It carries API SN licensing and meets ILSAC GF‑5 and Dexos1 specifications, making it suitable for a wide range of modern vehicles without requiring special changeover procedures.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil help protect my engine during daily driving?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple 10W‑30 is formulated to provide a durable lubricating film that minimizes metal‑to‑metal contact and wear under normal and heavy driving conditions. The additive chemistry targets corrosion and oxidative breakdown to extend service life between oil changes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced anti‑wear additives reduce friction on bearing and cam surfaces\u003c\/li\u003e\n  \u003cli\u003eOxidation inhibitors slow oil thickening at high temperatures\u003c\/li\u003e\n  \u003cli\u003eCorrosion inhibitors protect internal parts from acidic byproducts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill switching to Royal Purple require any special procedures?\u003c\/h3\u003e\n\u003cp\u003eNo special flushing or engine modifications are needed when changing to this product; it is designed to be compatible with both mineral and other synthetic oils. For new gasoline engines, Royal Purple recommends waiting until the manufacturer’s first scheduled oil change before making the switch.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect drop‑in replacement for most gasoline and diesel engines\u003c\/li\u003e\n  \u003cli\u003eCompatible with existing oil filters and drain procedures\u003c\/li\u003e\n  \u003cli\u003eSuggested changeover timing for new engines: after first factory oil change\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow can this oil affect fuel economy and emissions components?\u003c\/h3\u003e\n\u003cp\u003eThe formula is optimized to reduce parasitic drag and friction within the engine, which can translate to modest improvements in fuel efficiency under typical driving. It also includes additives to protect catalytic converters and other emissions hardware from premature degradation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower internal friction for potential fuel savings\u003c\/li\u003e\n  \u003cli\u003eFormulated to be gentle on catalytic systems and sensors\u003c\/li\u003e\n  \u003cli\u003eImproved compatibility with ethanol‑blended fuels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this oil suitable for my vehicle’s manufacturer specifications?\u003c\/h3\u003e\n\u003cp\u003eThis product carries API SN licensing and meets ILSAC GF‑5 and Dexos1 performance targets, covering requirements for many modern passenger cars and light trucks. Always consult your owner’s manual to confirm viscosity and specification requirements for your engine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAPI SN licensed for broad gasoline engine compatibility\u003c\/li\u003e\n  \u003cli\u003eMeets ILSAC GF‑5 for fuel economy and protection\u003c\/li\u003e\n  \u003cli\u003eDexos1 performance support for applicable GM engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers and vehicle owners who want a high‑quality, API‑licensed 10W‑30 synthetic motor oil that balances protection, fuel efficiency, and emissions system care. It’s a practical choice for owners of gasoline and diesel passenger vehicles and light trucks who prefer a drop‑in synthetic option compatible with existing oil types and factory service intervals.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix Royal Purple 10W‑30 with conventional oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is compatible with mineral and other synthetic oils and can be used as a drop‑in replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil meet manufacturer specifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This formula is API SN licensed and meets ILSAC GF‑5 and Dexos1 performance requirements; check your manual for exact fit.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55168598671703,"sku":"B005SEJRSE","price":80.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-51130-front-label.jpg?v=1790409700"},{"product_id":"royal-purple-engine-break-in-oil-10w-30-pack-of-6-quarts-high-zddp-mineral-formula-for-cam-and-lifter-protection","title":"Royal Purple Engine Break-In Oil 10W-30 — Pack of 6 Quarts, High ZDDP Mineral Formula for Cam and Lifter Protection","description":"\u003cb\u003eRoyal Purple 11487 Engine Break-In Oil 10W-30 is a specially formulated mineral-based lubricant designed to protect camshafts, lifters and rotating assemblies during an engine's initial break-in period.\u003c\/b\u003e\n\n\u003cp\u003eWhen you’re assembling a new or rebuilt engine, the first miles matter. This break-in oil blends highly refined mineral base stocks with elevated levels of zinc and phosphorus additives to encourage proper ring seating and to limit wear on flat tappet and roller lifter systems. Developed with input from experienced engine builders, the formula is fully balanced so no extra additives are needed during the break-in service interval.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil help during initial engine break-in?\u003c\/h3\u003e\n\u003cp\u003eDuring break-in, components are mating and surfaces are establishing contact patterns. The 10W-30 viscosity delivers dependable film strength at startup and operating temperatures, while zinc and phosphorus provide extra anti-wear chemistry to protect cam lobes and lifter faces until surfaces are properly run in.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMineral-based 10W-30 viscosity for controlled run-in\u003c\/li\u003e\n  \u003cli\u003eHigh zinc (ZDDP) and phosphorus levels for anti-wear protection\u003c\/li\u003e\n  \u003cli\u003eFormulated to promote ring seating and reduce premature wear\u003c\/li\u003e\n  \u003cli\u003eNo additional break-in additives required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen should I switch from break-in oil to a long-term lubricant?\u003c\/h3\u003e\n\u003cp\u003eFollow your engine builder’s or manufacturer’s recommended break-in mileage or hours. After the specified break-in period, drain the mineral break-in oil and install a long-term synthetic or high-performance oil to maintain ongoing protection and thermal stability for normal driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChange oil at the recommended break-in interval (per builder\/manufacturer)\u003c\/li\u003e\n  \u003cli\u003eFlush if directed, then install Royal Purple synthetic for long-term use\u003c\/li\u003e\n  \u003cli\u003eReplacing filter at the change maximizes cleanliness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil protect flat tappet and roller lifter engines?\u003c\/h3\u003e\n\u003cp\u003eYes—this break-in oil contains boosted levels of zinc and phosphorus to help protect cam lobes and lifters while surfaces are seating. It is targeted at engines that require elevated anti-wear additives during the critical run-in phase, particularly flat tappet designs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eElevated ZDDP levels tailored for flat tappet protection\u003c\/li\u003e\n  \u003cli\u003eHelps reduce cam and lifter wear during early operation\u003c\/li\u003e\n  \u003cli\u003eSuitable for both flat tappet and roller lifter engines during break-in\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre extra chemicals or additives needed with this formula?\u003c\/h3\u003e\n\u003cp\u003eNo. This product is fully formulated for the break-in period and does not require supplemental break-in chemicals or additive packages. Its composition was developed with engine builders to provide the combination of base oil and anti-wear chemistry needed for initial engine protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete formulation—no additional break-in additives required\u003c\/li\u003e\n  \u003cli\u003eDesigned with builder feedback to meet run-in needs\u003c\/li\u003e\n  \u003cli\u003ePackaged as individual 1-quart bottles, sold here as a 6-quart pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for: Builders, restorers and performance enthusiasts installing or rebuilding gasoline engines who need a dedicated break-in lubricant. If you’re assembling a new or rebuilt motor—especially one with flat tappet cams—or preparing to run-in a high-performance engine, Royal Purple 11487 10W-30 break-in oil provides targeted anti-wear chemistry and mineral base oil preferred during the initial service interval. After break-in, switch to a high-performance synthetic oil for long-term protection and thermal stability.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple 11487 safe for flat tappet cams?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—this break-in oil includes elevated zinc and phosphorus levels specifically to reduce wear on flat tappet cams during initial run-in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I add other break-in additives?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No additional additives are required; the formula is fully balanced for the break-in period and should be used as supplied.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55169097498967,"sku":"B007SPVLO4","price":114.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-break-in-oil-quart-front.jpg?v=1790418643"},{"product_id":"royal-purple-hmx-synthetic-high-mileage-motor-oil-10w-30-5-qt-seal-conditioning-anti-wear-protection","title":"Royal Purple HMX Synthetic High-Mileage Motor Oil 10W-30 — 5 qt, seal-conditioning \u0026 anti-wear protection","description":"\u003cstrong\u003eRoyal Purple HMX SAE 10W-30 is a high-mileage synthetic motor oil formulated to reduce wear, rejuvenate seals, and restore performance in engines with more than 75,000 miles.\u003c\/strong\u003e\n\nRoyal Purple HMX combines fortified anti-wear zinc\/phosphorus chemistry with the brand's proprietary Synerlec additive package to tackle the specific needs of aging gasoline engines. Designed for passenger cars and light trucks, this 5-quart formula focuses on cleaning deposits, reconditioning hardened seals, lowering oil consumption, and delivering enhanced film strength to reduce friction and metal-to-metal contact. It meets API SJ, SL, SM and SN specifications and is engineered to help preserve engine components while providing resistance to oxidation and degradation under longer drain intervals.\n\n\u003ch3\u003eHow does HMX restore performance in older engines?\u003c\/h3\u003e\n\u003cp\u003eHMX balances detergency and anti-wear additives to address issues that develop as mileage rises. It lifts and disperses sludge and varnish while replenishing lost seal elasticity so oil consumption and leaks are reduced.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynerlec additive technology cleans deposits and maintains internal cleanliness\u003c\/li\u003e\n  \u003cli\u003eZinc\/phosphorus anti-wear agents strengthen protection at critical contact points\u003c\/li\u003e\n  \u003cli\u003eChemicals condition seals to reduce seepage and lower oil burn-off\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan HMX reduce friction and protect during start-up?\u003c\/h3\u003e\n\u003cp\u003eYes — the formula creates robust film strength that minimizes metal-to-metal contact, especially at cold starts when wear risk is highest. Ionic attraction in the additive package helps the oil cling to metal surfaces for immediate protection at crank.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExceptional film strength reduces friction and wear\u003c\/li\u003e\n  \u003cli\u003eProtective chemistry bonds to metal during start-up\u003c\/li\u003e\n  \u003cli\u003eFormulation designed to lower noise and improve smoothness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill HMX allow longer oil change intervals?\u003c\/h3\u003e\n\u003cp\u003eHMX offers strong oxidation resistance that can support extended drain intervals in mechanically sound, unmodified engines with proper filtration. Royal Purple recommends two initial short \"clean-up\" drains to fully remove built-up contaminants before increasing interval length.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOxidation-resistant base to maintain viscosity over time\u003c\/li\u003e\n  \u003cli\u003eRecommended two 3,000-mile cleanup drains before extending intervals\u003c\/li\u003e\n  \u003cli\u003eCan be used up to 15,000 miles or 12 months in suitable engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use HMX in my maintenance routine?\u003c\/h3\u003e\n\u003cp\u003eSwap to HMX during a scheduled oil change, perform the two short cleanup intervals if converting from conventional oil or heavy deposit conditions, then continue with recommended filters and monitoring. Keep an eye on oil level and engine condition when moving to extended drains.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall fresh oil filter at every change when using HMX\u003c\/li\u003e\n  \u003cli\u003ePerform two 3,000-mile cleanup drains after conversion\u003c\/li\u003e\n  \u003cli\u003eMonitor oil consumption and engine performance before extended drains\u003c\/li\u003e\n\u003c\/ul\u003e\n\nWho this is for: Royal Purple HMX SAE 10W-30 is aimed at owners of gasoline passenger cars and light trucks with engines over 75,000 miles who want to reduce wear, cut oil consumption, and refresh engine seals without disassembly. It suits enthusiasts and everyday drivers who maintain their vehicles, keep proper filtration, and prefer a high-performance synthetic oil engineered for longevity and deposit control. Avoid using HMX as a substitute for required mechanical repairs; it supports preservation and restoration of oil-related performance but is not a fix for major mechanical failures.\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple HMX compatible with my gasoline engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. HMX 10W-30 is formulated for gasoline passenger cars and light trucks and meets API SJ, SL, SM and SN specifications for older engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I extend oil change intervals with HMX?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Potentially. After two recommended 3,000-mile cleanup drains, HMX can support up to 15,000 miles or 12 months in mechanically sound engines with proper filtration.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55169243349335,"sku":"B00G3BRNOG","price":83.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-label.jpg?v=1790421475"},{"product_id":"royal-purple-sae-5w-20-synthetic-motor-oil-case-of-6-1-qt-api-licensed-high-performance-protection","title":"Royal Purple SAE 5W-20 Synthetic Motor Oil — Case of 6 × 1 Qt, API‑Licensed High‑Performance Protection","description":"\u003cstrong\u003eRoyal Purple SAE 5W-20 API-licensed synthetic motor oil is a fully synthetic engine lubricant designed to protect, clean, and help engines run efficiently under varied conditions.\u003c\/strong\u003e\n\n\u003cp\u003eThis high-performance 5W-20 motor oil comes from Royal Purple’s proprietary blend of premium base stocks and additive chemistry, formulated to meet API SN standards and ILSAC GF-5 \/ Dexos1+ performance where applicable. Sold as a case of six 1-quart bottles, it suits passenger vehicles requiring SAE 5W-20 viscosity and owners who prefer to stock up for routine changes. As a fully synthetic product, it differs from conventional mineral oils in formulation and behavior, especially at temperature extremes.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil behave in cold starts and normal operating temperatures?\u003c\/h3\u003e\n\u003cp\u003eSAE 5W-20 indicates low cold-cranking viscosity and a 20-rating at normal engine temperature, so it flows quickly on startup while providing stable film strength when hot. The synthetic base stocks are engineered to maintain consistent viscosity across temperature swings, helping reduce friction during the most demanding cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e5W rating for improved cold-weather pumpability and faster lubrication on startup\u003c\/li\u003e\n  \u003cli\u003e20 hot-viscosity for stable protection at typical operating temperatures\u003c\/li\u003e\n  \u003cli\u003eFormulated to resist breakdown and maintain viscosity longer than many conventional oils\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill switching to Royal Purple require special steps or service?\u003c\/h3\u003e\n\u003cp\u003eTransitioning to this Royal Purple synthetic oil generally requires no special procedures; it is compatible with mineral and other synthetic oils. Royal Purple recommends following the vehicle manufacturer’s guidance, and for new engines waiting until the first scheduled break-in oil change before switching is suggested by the brand.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect swap compatible with existing oil types—no flushing required unless preferred\u003c\/li\u003e\n  \u003cli\u003eFollow manufacturer oil-change intervals and vehicle owner’s manual recommendations\u003c\/li\u003e\n  \u003cli\u003eRecommended to use after initial engine break-in in new gasoline engines per brand guidance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect from this product?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple’s synthetic formulation is designed to support reduced engine wear, cleaner internals, and potentially improved fuel economy compared with many conventional oils. The blend includes additives aimed at protecting emission components and improving compatibility with modern fuels, including ethanol blends.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnhanced wear protection to help extend engine component life\u003c\/li\u003e\n  \u003cli\u003eFormulation intended to help maintain catalytic system performance\u003c\/li\u003e\n  \u003cli\u003eDesigned for improved compatibility with gasoline containing ethanol\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this oil right for my vehicle and service needs?\u003c\/h3\u003e\n\u003cp\u003eAlways verify the recommended oil viscosity and API classifications in your vehicle owner’s manual before use. This Royal Purple SAE 5W-20 meets API SN and related performance specs, making it suitable for a wide range of modern gasoline engines that call for 5W-20 viscosity and those seeking a fully synthetic option.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets API SN and ILSAC GF-5 \/ Dexos1+ performance where applicable\u003c\/li\u003e\n  \u003cli\u003eIntended for gasoline and compatible diesel applications as specified by the manufacturer\u003c\/li\u003e\n  \u003cli\u003eAvailable as a convenient case of six 1-quart bottles for multiple oil changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This case of Royal Purple SAE 5W-20 synthetic oil is aimed at vehicle owners, fleet managers, and DIY enthusiasts who want a fully synthetic 5W-20 that adheres to modern API standards. It’s a practical choice for anyone who prefers to keep multiple oil changes on hand, wants a synthetic upgrade from conventional oils, or needs compatibility with ethanol-blended fuels and modern emission systems. Confirm your vehicle’s specifications before using, and maintain regular service intervals for the best results.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix this synthetic oil with my existing oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Royal Purple 5W-20 is compatible with conventional and other synthetic oils, so a direct swap is generally fine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil meet manufacturer specifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This product is API SN licensed and meets ILSAC GF-5 and Dexos1+ performance where applicable; always check your manual first.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55169324613975,"sku":"B00ELHTC5C","price":106.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-label-case-of-six.jpg?v=1790422306"},{"product_id":"royal-purple-max-gear-75w-90-gear-oil-set-3-x-1-quart-bottles-gl-5-gl-4-synthetic","title":"Royal Purple Max Gear 75W-90 Gear Oil Set — 3 x 1-Quart Bottles, GL-5\/GL-4 Synthetic","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max Gear 75W-90 is a high-performance hypoid gear oil in a convenient three-quart set designed to protect heavily loaded differentials and manual transmissions while improving efficiency and longevity.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for demanding automotive, truck and marine applications that call for API GL-5 or GL-4 gear oils, this Max Gear formulation blends premium synthetic base oils with Royal Purple’s Synerlec additive package. The result is a lubricant engineered to lower operating temperatures, resist corrosion to soft yellow metals, and reduce friction — all while maintaining compatibility with synchronized transmissions and limited-slip differentials. Each kit contains three 1-quart (32-ounce) bottles, ideal for maintenance intervals or multi-vehicle servicing.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max Gear protect heavily loaded gears?\u003c\/h3\u003e\n\u003cp\u003eMax Gear is formulated to create a durable film under extreme pressures to shield gear teeth and bearings from wear. Its additives help separate metal surfaces, reducing metal-to-metal contact during shock loads and continuous duty cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynerlec additive package for persistent film strength\u003c\/li\u003e\n  \u003cli\u003eHigh-quality synthetic base oils for thermal stability\u003c\/li\u003e\n  \u003cli\u003eLow coefficient of friction to minimize wear\u003c\/li\u003e\n  \u003cli\u003eProven performance in severe-service conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work with my differential, transmission, or marine lower unit?\u003c\/h3\u003e\n\u003cp\u003eYes — Max Gear is suitable for front and rear differentials, manual transmissions and lower gear units of marine engines that specify API GL-5 or GL-4 service. It also separates quickly from water, a useful trait for marine and off-road use where moisture intrusion can occur.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets GL-5\/GL-4 specifications where required\u003c\/li\u003e\n  \u003cli\u003eFast water separation protects lubricant film integrity\u003c\/li\u003e\n  \u003cli\u003eCompatible with synchronizers and limited-slip components\u003c\/li\u003e\n  \u003cli\u003eFormulated to meet warranty and OEM expectations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan Max Gear improve driveline efficiency and vehicle performance?\u003c\/h3\u003e\n\u003cp\u003eBy reducing internal drag and lowering friction, Max Gear helps gears run cooler and smoother, which can translate to more efficient power transfer. That reduction in parasitic loss can be particularly beneficial for trucks and 4x4s that experience heavy drivetrain loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReduces operating temperature for extended component life\u003c\/li\u003e\n  \u003cli\u003eFriction modifiers optimize power flow through the drivetrain\u003c\/li\u003e\n  \u003cli\u003eQuieter gear operation due to improved lubrication\u003c\/li\u003e\n  \u003cli\u003ePotential fuel-efficiency gains from reduced drivetrain drag\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance benefits come with a three-quart pack?\u003c\/h3\u003e\n\u003cp\u003eA case of three one-quart bottles offers flexibility for routine maintenance or for fleets and hobbyists servicing multiple vehicles. Smaller bottles are easier to store, measure and pour without waste, and the set covers several partial or complete gear oil changes depending on vehicle capacity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThree individual 1-quart bottles for convenient handling\u003c\/li\u003e\n  \u003cli\u003eIdeal for topping off or full service on many differentials\u003c\/li\u003e\n  \u003cli\u003eReduces the need to buy single large containers for small jobs\u003c\/li\u003e\n  \u003cli\u003eGood for technicians, DIYers and multi-vehicle owners\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this product is for: Royal Purple Max Gear 75W-90 in a three-quart set is aimed at owners and technicians who maintain trucks, SUVs, off-road vehicles, manual-transmission cars and marine lower units that require API GL-5\/GL-4 gear oils. It's particularly useful for drivers seeking a robust synthetic-grade lubricant that improves gear protection and driveline efficiency without adding separate additives. Choose this kit if you value extended gear life, reduced operating temperatures and reliable corrosion protection for components made from soft yellow metals.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple Max Gear 75W-90 safe for limited-slip differentials?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Max Gear is formulated for limited-slip differentials and includes friction modifiers so no extra additive is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this oil in marine lower gear units?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is suitable for lower gear units that call for API GL-5 or GL-4 and separates rapidly from water.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170123792727,"sku":"B074WC7XSD","price":92.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-gear-front-packaging_a7e25988-8da1-4482-9b71-7a6e258f91b2.jpg?v=1790423641"},{"product_id":"royal-purple-2-stroke-oil-xpr-2-c-1-gallon-128-oz-full-synthetic-premix-high-performance-power-wear-protection","title":"Royal Purple 2-Stroke Oil XPR 2-C — 1 Gallon (128 oz) full-synthetic premix, high-performance power \u0026 wear protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple XPR 2-C is a full-synthetic 2-stroke pre-mix oil formulated to boost power, reduce wear and keep combustion ports and spark plugs cleaner in high-performance 2-cycle engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for racing and other high-demand 2-cycle applications, Royal Purple XPR 2-C (formerly 2-Cycle TCW III Racing) is a modern synthetic lubricant engineered to deliver consistent protection and performance when mixed with gasoline. Its synthetic solvency helps prevent carbon buildup in exhaust ports and on spark plugs while a low coefficient of friction supports higher engine speeds and improved throttle response. This product is intended for premix use in performance-oriented two-stroke engines rather than stock oil-injection systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow does XPR 2-C improve engine performance?\u003c\/h3\u003e\n\u003cp\u003eXPR 2-C reduces internal friction and helps maintain cleaner combustion chambers so engines can produce more usable power and rev more freely. The formulation is optimized for total-loss 2-stroke systems where the oil is burned along with fuel, balancing protection with minimal deposits.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFull-synthetic base for consistent viscosity at varied temperatures\u003c\/li\u003e\n  \u003cli\u003eLow friction characteristics to support increased RPM and throttle response\u003c\/li\u003e\n  \u003cli\u003eSynthetic solvency that helps keep ports and spark plugs cleaner\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil protect my 2-stroke engine from wear?\u003c\/h3\u003e\n\u003cp\u003eYes — XPR 2-C provides robust wear protection tailored to high-performance 2-cycle engines. It forms a durable lubricating film under high heat and load, helping reduce scoring and component wear without leaving heavy deposits that can degrade performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for high-heat racing and performance conditions\u003c\/li\u003e\n  \u003cli\u003eReduces metal-to-metal contact to extend component life\u003c\/li\u003e\n  \u003cli\u003eCleaner combustion reduces abrasive carbon buildup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use Royal Purple XPR 2-C in my equipment?\u003c\/h3\u003e\n\u003cp\u003eMix XPR 2-C with gasoline at the manufacturer-recommended ratio for your engine or the ratio you use for performance tuning. Because this is a premix product, Royal Purple does not recommend using it with standard oil-injection systems; instead add directly to the fuel for total-loss lubrication setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow your engine manual or tuning guide for the correct fuel-to-oil ratio\u003c\/li\u003e\n  \u003cli\u003eAdd oil to the fuel and mix thoroughly before filling the fuel tank\u003c\/li\u003e\n  \u003cli\u003eStore in a cool, dry place and keep the container sealed when not in use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil cause excess smoke or deposits in my exhaust?\u003c\/h3\u003e\n\u003cp\u003eXPR 2-C is formulated to burn cleanly in two-stroke combustion, minimizing excessive smoke and reducing sticky carbon deposits compared with many conventional 2-stroke oils. Actual smoke level depends on mixture ratio, engine condition, and tuning.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynthetic solvency helps reduce plug and port fouling\u003c\/li\u003e\n  \u003cli\u003eCleaner burn characteristics than many non-synthetic 2-stroke oils\u003c\/li\u003e\n  \u003cli\u003ePerformance results vary with engine setup and mixture strength\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple XPR 2-C is aimed at racers, tuners and enthusiasts running high-performance two-stroke engines in motorcycles, snowmobiles, karting, marine outboards and other premix applications. Choose this oil if you want a full-synthetic, performance-focused lubricant that emphasizes cleaner combustion, reduced friction and increased wear protection. If your machine uses a factory oil-injection system, consult the manufacturer before using a premix-only formulation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Royal Purple XPR 2-C with oil-injection systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. XPR 2-C is formulated for premix use only and Royal Purple does not recommend it for stock oil-injection systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What engines are compatible with XPR 2-C?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use in high-performance two-stroke premix engines like race bikes, karts, snowmobiles and some marine outboards following proper mix ratios.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170246771031,"sku":"B000BRP65G","price":93.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-xpr-2c-front-gallon.jpg?v=1790425906"},{"product_id":"royal-purple-hps-10w-30-synthetic-motor-oil-1-qt-case-of-6-synerlec-anti-wear-protection","title":"Royal Purple HPS 10W-30 Synthetic Motor Oil — 1 Qt Case of 6, Synerlec Anti-Wear Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HPS 10W-30 is a full-synthetic motor oil engineered with Synerlec additive technology and high zinc\/phosphorus levels to deliver superior wear protection and improved performance for street and modified engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for drivers who demand more than a basic lubricant, Royal Purple HPS 10W-30 is a fully synthetic engine oil that helps protect metal surfaces, stabilize viscosity across temperatures, and support horsepower and torque retention under high load. This 1-quart, case-of-6 packaging (part 36130-6PK) offers convenient supply for regular maintenance or multi-vehicle households. Always consult your vehicle owner’s manual to confirm SAE 10W-30 is the recommended viscosity for your engine.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Royal Purple HPS 10W-30 protect high-performance engines?\u003c\/h3\u003e\n\u003cp\u003eHPS is formulated with a robust anti-wear chemistry that reduces metal-to-metal contact during demanding driving conditions. Its Synerlec additive works as a sacrificial protective layer, complementing boosted zinc and phosphorus levels to defend lifters, cams, and bearings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh zinc\/phosphorus anti-wear package for cam and lifter protection\u003c\/li\u003e\n  \u003cli\u003eSynerlec additive creates a durable protective film on metal surfaces\u003c\/li\u003e\n  \u003cli\u003eStable viscosity resists thinning under pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil improve fuel economy or performance?\u003c\/h3\u003e\n\u003cp\u003eWhile results vary by engine and driving style, full-synthetic formulas like HPS can reduce internal friction compared with many conventional oils, which may help maintain horsepower and optimize fuel use. The advanced additive blend is intended to protect efficiency by minimizing wear and preserving clearances.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLow-friction synthetic base stocks reduce mechanical drag\u003c\/li\u003e\n  \u003cli\u003eMaintains viscosity to preserve engine tolerances and output\u003c\/li\u003e\n  \u003cli\u003eMay help sustain fuel economy trends versus worn or conventional oils\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Royal Purple HPS 10W-30 suitable for modified or older vehicles?\u003c\/h3\u003e\n\u003cp\u003eHPS was created specifically for high-performance and modified engines as well as vehicles no longer covered by manufacturer warranties. Its additive profile addresses the demands of engines with higher loads, tighter tolerances, or altered operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended for modified, high-output, and naturally aspirated engines\u003c\/li\u003e\n  \u003cli\u003eGood choice for older vehicles needing stronger anti-wear protection\u003c\/li\u003e\n  \u003cli\u003eNot limited to race cars—designed for street-driven performance machines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does SAE 10W-30 behave across temperatures?\u003c\/h3\u003e\n\u003cp\u003eSAE 10W-30 indicates the oil flows like a 10-weight at cold startup and behaves like a 30-weight at normal operating temperature. That balance offers reliable cold start protection while preserving film strength and viscosity during typical driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10W rating eases cold starts and reduces initial wear\u003c\/li\u003e\n  \u003cli\u003e30 rating maintains protection once the engine reaches operating temperature\u003c\/li\u003e\n  \u003cli\u003eSuitable for many climates, but always verify with vehicle specs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple HPS 10W-30 is aimed at drivers who want a performance-grade, full-synthetic oil for street vehicles—especially owners of modified, high-output, or older engines seeking stronger anti-wear protection and stable performance. It’s a practical choice for enthusiasts, small fleets, and anyone who prefers to buy oil in multi-quart cases for regular maintenance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaximum wear protection\u003c\/li\u003e\n  \u003cli\u003eIncrease horsepower and torque\u003c\/li\u003e\n  \u003cli\u003eAdvanced protection for performance and modified engines\u003c\/li\u003e\n  \u003cli\u003eExceptional oxidation stability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Royal Purple HPS 10W-30 in my daily driver?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, if your owner’s manual approves SAE 10W-30. HPS is suitable for street-driven and performance engines requiring enhanced wear protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change the oil when using this synthetic?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Change intervals depend on driving conditions and manufacturer recommendations; many users follow 5,000–10,000 mile synthetic intervals or OEM guidance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170270101847,"sku":"B00ELHT3N8","price":115.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-label-36130-6pk.jpg?v=1790426396"},{"product_id":"royal-purple-hps-20w-50-synthetic-motor-oil-case-of-6-1-qt-bottles-synerlec-full-synthetic-for-high-performance-high-mileage","title":"Royal Purple HPS 20W-50 Synthetic Motor Oil Case of 6 — 1 qt Bottles, Synerlec Full-Synthetic for High-Performance \u0026 High-Mileage","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HPS 20W-50 is a full-synthetic, high-performance motor oil formulated with Synerlec to protect and maximize power in older or modified gasoline engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for drivers who demand more from their engine oil, Royal Purple HPS Series uses a synthetic base and the brand’s proprietary Synerlec additive to deliver robust film strength, enhanced anti-wear protection, and improved sealing for piston rings. This 20W-50 viscosity is targeted at vehicles that run hotter, have higher clearances, or operate under heavier loads. Sold as a convenient case of six 1-quart bottles, this pack is ideal for frequent changers, home garages, and small shops that service performance or high-mileage engines.\u003c\/p\u003e\n\n\u003ch3\u003eWhat makes this 20W-50 synthetic different from conventional oils?\u003c\/h3\u003e\n\u003cp\u003eUnlike mineral oils refined from crude, this product is engineered from synthetic base stocks combined with a concentrated additive package. The Synerlec additive helps form a protective film on metal surfaces, improving boundary lubrication where components meet under pressure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFull-synthetic formulation, not crude-derived\u003c\/li\u003e\n  \u003cli\u003eSynerlec additive for enhanced surface protection\u003c\/li\u003e\n  \u003cli\u003eHigh zinc\/phosphorus anti-wear concentration for valve train protection\u003c\/li\u003e\n  \u003cli\u003eConsistent viscosity at operating temperature for stable lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does Royal Purple HPS 20W-50 protect high-performance or modified engines?\u003c\/h3\u003e\n\u003cp\u003eThis grade is formulated to maintain a strong lubricating film at elevated temperatures and pressures common in tuned, older, or heavy-duty engines. The oil’s exceptional film strength reduces metal-to-metal contact, which can lower wear rates and help extend component life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigher hot-viscosity (SAE 50) for thick, durable oil films\u003c\/li\u003e\n  \u003cli\u003eAnti-wear additives reduce wear on bearings and cam lobes\u003c\/li\u003e\n  \u003cli\u003eImproved sealing at piston rings helps preserve compression and torque\u003c\/li\u003e\n  \u003cli\u003eHelps manage heat to reduce thermal breakdown under stress\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work for everyday driving or only for track use?\u003c\/h3\u003e\n\u003cp\u003eWhile optimized for performance and modified engines, 20W-50 HPS can be suitable for everyday driving in vehicles that recommend or tolerate a heavier viscosity. Always consult the vehicle owner’s manual to confirm compatibility; this viscosity is most common in older designs, air-cooled engines, or engines operating in hot climates or under heavy loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended for high-mileage, older, or modified gasoline engines\u003c\/li\u003e\n  \u003cli\u003eAppropriate for hot-weather or severe operating conditions\u003c\/li\u003e\n  \u003cli\u003eNot typically required for late-model cars calling for lower viscosity oils\u003c\/li\u003e\n  \u003cli\u003eBest for vehicles out of factory warranty seeking added protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use this case pack, and what are the practical benefits?\u003c\/h3\u003e\n\u003cp\u003eThe case contains six 1-quart bottles, making it simple to keep an on-hand supply for multiple oil changes or to service several vehicles. Bulk purchasing reduces trips to the store and often lowers per-quart cost compared with buying single bottles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSix 1-qt bottles per case for convenience and multi-change needs\u003c\/li\u003e\n  \u003cli\u003eIdeal for DIYers, small shops, or multiple-vehicle households\u003c\/li\u003e\n  \u003cli\u003eStored properly, synthetic oil has long shelf stability\u003c\/li\u003e\n  \u003cli\u003eConsistent product across bottles ensures repeatable service results\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple HPS 20W-50 is aimed at owners of performance, modified, classic, or high-mileage gasoline engines that benefit from a thicker hot-viscosity oil. It’s a good choice for drivers in warm climates, people who tow or haul, and anyone looking to add stronger anti-wear protection and improved ring sealing. If your vehicle manufacturer specifically requires a lower-viscosity synthetic for warranty reasons, consult the manual before switching; otherwise, this HPS blend provides a high level of mechanical protection and consistency for demanding driving conditions.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple HPS 20W-50 suitable for turbocharged engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it's compatible with many turbocharged gasoline engines that accept 20W-50; verify your owner's manual for the recommended viscosity first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change this synthetic oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Change intervals depend on use and manufacturer guidance; many owners change every 5,000–10,000 miles under typical driving, but severe use may require more frequent changes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170270167383,"sku":"B00ELHT3QK","price":116.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-case-front-packaging.jpg?v=1790426399"},{"product_id":"royal-purple-10w-40-synthetic-motor-oil-case-of-6-1-qt-synerlec-elevated-zddp-for-high-performance-engines","title":"Royal Purple 10W-40 Synthetic Motor Oil Case of 6 (1 qt) — Synerlec \u0026 Elevated ZDDP for High‑Performance Engines","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HPS 10W-40 is a full-synthetic motor oil formulated with Synerlec and elevated zinc\/phosphorus anti-wear chemistry to protect and optimize high‑performance and modified engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a high-performance street motor oil, this 10W-40 grade from Royal Purple is a fully synthetic lubricant engineered to lubricate, clean and cool internal combustion engines under demanding conditions. It’s blended to provide stable viscosity from cold starts through operating temperature, with proprietary Synerlec additive technology and a higher concentration of ZDDP-style anti-wear agents to support engines that see elevated loads, tuning, or are no longer covered by factory warranties.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil behave in cold starts and normal running temperatures?\u003c\/h3\u003e\n\u003cp\u003eThe SAE 10W-40 rating indicates flow characteristics at low temperatures (10W) and a robust viscosity at operating temperature (40). That combination helps ensure pumpability at startup while maintaining a protective film during normal and high-load operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10W cold-start rating for reliable circulation at lower temperatures\u003c\/li\u003e\n  \u003cli\u003e40 operating viscosity to preserve film thickness under heat\u003c\/li\u003e\n  \u003cli\u003eSynthetic base stocks resist thermal breakdown better than many conventional oils\u003c\/li\u003e\n  \u003cli\u003eSynerlec additives help maintain protective properties across temperature swings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat protection does Synerlec and the zinc\/phosphorus package provide?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple’s Synerlec is a proprietary friction-modifying additive system that works with elevated zinc\/phosphorus anti-wear chemistry to reduce metal-to-metal wear under severe conditions. The formulation is particularly useful for engines with high valve train stress or older engines that benefit from additional anti-wear agents.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFortified ZDDP-style chemistry for cam and lifter protection\u003c\/li\u003e\n  \u003cli\u003eSynerlec improves film strength where contact pressures rise\u003c\/li\u003e\n  \u003cli\u003eHelps minimize wear during heavy acceleration, towing, or spirited driving\u003c\/li\u003e\n  \u003cli\u003eEngine-cleaning detergents maintain internal surface condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work for my vehicle and when should I choose HPS over OEM-grade oil?\u003c\/h3\u003e\n\u003cp\u003eAlways consult your owner’s manual to confirm recommended viscosity and specifications. HPS is engineered for drivers seeking enhanced protection and performance—especially modified, high-mileage, or out-of-warranty vehicles—rather than strictly meeting factory warranty requirements that often specify lower anti-wear additive levels.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuitable when 10W-40 is within manufacturer recommendations\u003c\/li\u003e\n  \u003cli\u003eRecommended for modified engines, high-performance street use, or older engines\u003c\/li\u003e\n  \u003cli\u003eNot intended to override manufacturer warranty requirements—check specs first\u003c\/li\u003e\n  \u003cli\u003eAvailable in multiple viscosities for broader vehicle compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does using a full synthetic like Royal Purple HPS affect fuel economy and maintenance intervals?\u003c\/h3\u003e\n\u003cp\u003eFull synthetic base stocks typically lower internal friction and resist oxidation better than conventional oils, which can help preserve efficiency and reduce deposit formation. While these oils can support improved fuel economy and cleaner engines, specific mileage gains and interval extensions depend on vehicle design and driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynthetic base oils reduce friction compared with many conventional formulations\u003c\/li\u003e\n  \u003cli\u003eImproved oxidation stability helps prevent sludge and varnish buildup\u003c\/li\u003e\n  \u003cli\u003ePotential for modest fuel-efficiency improvements in some engines\u003c\/li\u003e\n  \u003cli\u003eFollow manufacturer guidance for oil-change intervals and monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple HPS 10W-40 (case of six 1‑quart bottles) is aimed at enthusiasts, owners of modified or high-performance street vehicles, and drivers with older engines seeking stronger anti-wear defense. It’s also well suited to those who prefer a full‑synthetic lubricant with advanced additive chemistry for stable protection across temperature extremes. If your vehicle requires a different SAE grade or strict OEM additive limits for warranty reasons, verify compatibility before switching to HPS.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple HPS 10W-40 full synthetic?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. HPS 10W-40 is a full-synthetic motor oil formulated with Synerlec and enhanced anti-wear additives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this oil in a vehicle still under warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your owner’s manual. HPS contains elevated ZDDP levels that may not match some warranty-specific OEM specs.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170270265687,"sku":"B00ELHT3M4","price":116.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-hps-10w-40-front-packaging.jpg?v=1790426395"},{"product_id":"royal-purple-hps-5w-20-synthetic-motor-oil-1-quart-case-of-6-synerlec-anti-wear-protection","title":"Royal Purple HPS 5W-20 Synthetic Motor Oil — 1 Quart (Case of 6), Synerlec Anti‑Wear Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HPS 5W-20 is a full synthetic engine oil engineered with Synerlec additive technology to deliver enhanced wear protection, improved performance, and reliable viscosity control for high-performance and modified gasoline engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for drivers who demand more than standard factory fluids, this 5W-20 grade from Royal Purple is a full synthetic formulation designed to lubricate, cool, and clean modern engines while protecting metal surfaces under stress. The HPS (High Performance Street) line combines a high level of zinc\/phosphorus anti-wear chemistry with Royal Purple’s proprietary Synerlec package to fortify engines that operate at higher loads, higher temperatures, or those that have been modified for extra power.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil protect engines under high load?\u003c\/h3\u003e\n\u003cp\u003eHPS 5W-20 increases film strength where components contact under pressure, reducing wear on bearings, cams, and valve trains. The Synerlec additive bonds to metal surfaces to create an additional protective layer that performs when mechanical stress rises.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh zinc\/phosphorus anti-wear concentration for severe contact protection\u003c\/li\u003e\n  \u003cli\u003eSynerlec proprietary chemistry that reinforces boundary lubrication\u003c\/li\u003e\n  \u003cli\u003eAdvanced oxidation stability to resist breakdown at elevated temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill using a full synthetic 5W-20 affect fuel economy or startup protection?\u003c\/h3\u003e\n\u003cp\u003eBecause this oil is engineered with low-temperature fluidity, it helps oil circulate quickly at cold starts while maintaining the proper operating viscosity at temperature. Faster circulation lowers initial friction, which can contribute to modest fuel-efficiency benefits and improved protection during startup cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSAE 5W cold-cranking rating for rapid flow at low temperatures\u003c\/li\u003e\n  \u003cli\u003eStable 20-weight protection at normal engine operating temperature\u003c\/li\u003e\n  \u003cli\u003eFormulation that balances wear protection and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Royal Purple HPS 5W-20 suitable for modified or high-performance street engines?\u003c\/h3\u003e\n\u003cp\u003eYes — the HPS series is tailored for engines that experience higher thermal and mechanical demand than stock applications. It’s often chosen by owners of non-warranty, modified, or higher-mileage vehicles seeking extra durability and responsiveness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFormulated specifically for performance and modified gasoline engines\u003c\/li\u003e\n  \u003cli\u003eResponds to increased pressure with increased viscosity to maintain protection\u003c\/li\u003e\n  \u003cli\u003eAvailable in multiple viscosities to match varied engine needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know if 5W-20 is the right viscosity for my vehicle?\u003c\/h3\u003e\n\u003cp\u003eAlways consult your vehicle’s owner’s manual for the manufacturer-recommended oil viscosity and change intervals. If your manual lists 5W-20 or allows a range that includes 5W-20, this Royal Purple HPS formulation is a compatible high-performance synthetic option.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck the owner’s manual for recommended SAE viscosity and API specs\u003c\/li\u003e\n  \u003cli\u003eConsider HPS for vehicles out of warranty or with performance upgrades\u003c\/li\u003e\n  \u003cli\u003eWhen in doubt, consult a trusted mechanic or dealership guidance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple HPS 5W-20 (case of six 1-quart bottles) is aimed at performance-minded car owners, enthusiasts with modified engines, and drivers who want a higher level of anti-wear protection than standard factory oils provide. It’s a full synthetic choice for gasoline engines that benefit from strengthened boundary lubrication and improved stability under heat and load. If your vehicle requires 5W-20 and you prioritize durability, reduced friction at startup, and advanced additive protection, this product is designed to meet those needs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFeatures: Maximum Wear Protection, Increase Horsepower and Torque, Advanced Protection for Performance and Modified Engines, Exceptional Oxidation Stability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Royal Purple HPS 5W-20 in cars that still have warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your owner’s manual and warranty terms; HPS is best for vehicles where manufacturer approval for aftermarket oils isn’t restricted.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change this synthetic oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Follow your vehicle manufacturer’s interval or your technician’s recommendation; many drivers extend intervals with full synthetics but always monitor oil condition.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170317353303,"sku":"B00ELHT41Y","price":111.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-hps-5w20-front-label.jpg?v=1790427652"},{"product_id":"royal-purple-max-clean-fuel-system-cleaner-stabilizer-pack-of-2-2-x-20-oz-concentrated-injector-intake-valve-cleaner","title":"Royal Purple Max-Clean Fuel System Cleaner \u0026 Stabilizer — Pack of 2 (2 x 20 oz), Concentrated Injector \u0026 Intake Valve Cleaner","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max-Clean is a concentrated 3-in-1 fuel system cleaner and stabilizer sold as two 20-ounce bottles to clean injectors, stabilize fuel, and help restore performance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMax-Clean by Royal Purple is formulated for gasoline engines to remove deposits, condition fuel during storage, and support smoother combustion. Each 20 oz. bottle treats a full tank or multiple smaller fill-ups depending on dosage, and this two-pack keeps you stocked for routine maintenance or seasonal storage. The formula targets common fuel system contaminants and helps maintain consistent operation between service intervals.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max-Clean remove deposits and what parts does it affect?\u003c\/h3\u003e\n\n\u003cp\u003eThe product contains detergents and additives designed to dissolve varnish and carbon buildup on fuel injectors, intake valves, and combustion chambers. Regular use helps restore spray patterns and more complete fuel burn, which can reduce rough idling and hesitation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDetergent chemistry formulated for injector and intake valve cleaning\u003c\/li\u003e\n  \u003cli\u003eSafe for gasoline engines and compatible with most fuel systems\u003c\/li\u003e\n  \u003cli\u003eHelps recover lost power from restricted injectors or deposits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill using this fuel additive improve fuel economy or horsepower?\u003c\/h3\u003e\n\n\u003cp\u003eCleaning fuel system deposits can improve efficiency and performance by restoring proper fuel delivery and combustion. Field tests note average improvements in fuel economy and power after treatment, although results vary with vehicle age, condition, and driving habits.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDocumented average fuel economy gain around 3.2 percent in test scenarios\u003c\/li\u003e\n  \u003cli\u003eAverage horsepower increases reported near 2.6 percent in controlled testing\u003c\/li\u003e\n  \u003cli\u003eBest results when used as part of regular maintenance and with a clean air\/fuel system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use the 20 oz. bottle and how many treatments does one bottle provide?\u003c\/h3\u003e\n\n\u003cp\u003eDosage depends on tank size and whether you are treating one full tank or performing a concentrated service. One 20 oz. bottle is typically enough for a full tank of gasoline for most passenger vehicles; follow the label directions for precise mixing and treatment intervals.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eStandard dose treats one full tank—refer to label for exact ratios by tank size\u003c\/li\u003e\n  \u003cli\u003eUse one bottle for routine service or a partial dose for lighter maintenance\u003c\/li\u003e\n  \u003cli\u003eTwo-pack provides a spare bottle for the next maintenance interval or seasonal storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Max-Clean safe to use with modern fuel system technologies and additives?\u003c\/h3\u003e\n\n\u003cp\u003eMax-Clean is formulated to be compatible with modern gasoline formulations and common engine materials. It can be used with ethanol-blended fuels and in vehicles with direct injection, port injection, and turbocharged systems when used as directed.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with gasoline containing ethanol blends\u003c\/li\u003e\n  \u003cli\u003eDesigned for use in engines with direct or port fuel injection\u003c\/li\u003e\n  \u003cli\u003ePairs with regular maintenance—does not replace mechanical service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple Max-Clean 20 oz. (pack of 2) is aimed at car and light-truck owners who want a proactive, easy-to-use cleaner and stabilizer for gasoline systems. It suits drivers who perform regular maintenance, owners preparing vehicles for seasonal storage, and anyone noticing reduced throttle response, rough idle, or decreased fuel economy. Professional shops and DIY enthusiasts will appreciate the concentrated dose per bottle and the convenience of a two-pack for repeated treatments.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I use Royal Purple Max-Clean?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use as directed on the label; many users treat every 3,000–5,000 miles or before long storage periods.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Max-Clean be used with ethanol fuels?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—Max-Clean is compatible with common ethanol-blended gasoline when used according to instructions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170319647063,"sku":"B01B3TKGJQ","price":77.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-clean-front-packaging.jpg?v=1790427716"},{"product_id":"royal-purple-max-gear-75w-90-gear-oil-6-quart-case-synthetic-gl-5-gl-4-with-synerlec-protection","title":"Royal Purple Max Gear 75W-90 Gear Oil, 6-Quart Case — Synthetic GL-5\/GL-4 with Synerlec Protection","description":"\u003cstrong\u003eRoyal Purple Max Gear 75W-90 is a high-performance synthetic hypoid gear oil formulated to protect heavily loaded gears, bearings and differentials while reducing drag and noise.\u003c\/strong\u003e\n\n\u003cp\u003eDesigned for automotive, truck and marine lower-gear applications that call for API GL-5 or GL-4 fluids, this 6-quart case of Royal Purple Max Gear (75W-90) blends premium synthetic base oils with Royal Purple's Synerlec additive technology for extended component life and reliable corrosion resistance. It’s safe for use with yellow metals and synchronizers, and it requires no extra additives thanks to its built-in friction modifier. The formulation focuses on improved gear smoothness, cooler running temperatures and quieter operation compared with many conventional oils.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max Gear protect gears and bearings under heavy load?\u003c\/h3\u003e\n\u003cp\u003eMax Gear combines a high-quality synthetic lubricant base with a proprietary additive system that creates a strong, lubricating film on gear teeth and bearing surfaces. That film helps prevent metal-to-metal contact under high pressure and shock loads, reducing wear and extending component life without the need for aftermarket additives.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynthetic base oils for thermal stability and shear resistance\u003c\/li\u003e\n  \u003cli\u003eSynerlec additives that enhance film strength and protect metal surfaces\u003c\/li\u003e\n  \u003cli\u003eFriction modifier included to reduce micro-welding and scuffing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I use this oil in differentials, manual transmissions and marine gear units?\u003c\/h3\u003e\n\u003cp\u003eYes. Royal Purple Max Gear 75W-90 meets API GL-5 and GL-4 service categories, making it suitable for many automotive and truck differentials, manual transmissions that accept GL-4\/GL-5 fluids, and marine lower units that specify these ratings. Always check your equipment manufacturer’s recommendations for viscosity and API service before changing fluids.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended for front and rear differentials and manual transmissions\u003c\/li\u003e\n  \u003cli\u003eCompatible with many marine lower gear units specifying GL-5\/GL-4\u003c\/li\u003e\n  \u003cli\u003eNon-corrosive to brass, bronze and copper components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits will I notice after switching to Max Gear?\u003c\/h3\u003e\n\u003cp\u003eAfter switching, most users observe smoother gear engagement, reduced driveline noise and lower operating temperatures under load. The product’s combination of synthetic oil and Synerlec reduces drag and wear, which can improve drivetrain efficiency in trucks, 4x4s and heavy-duty equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuieter gear operation and smoother shifts\u003c\/li\u003e\n  \u003cli\u003eLower operating temperatures under severe conditions\u003c\/li\u003e\n  \u003cli\u003eReduced drivetrain drag for potential efficiency gains\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDoes this oil require extra additives or special maintenance steps?\u003c\/h3\u003e\n\u003cp\u003eNo extra additives are necessary; Max Gear is formulated with a friction modifier and corrosion inhibitors built in. Maintenance follows standard gear oil change intervals and inspection routines recommended by your vehicle or equipment manufacturer.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-packaged with friction modifier—no aftermarket friction additives needed\u003c\/li\u003e\n  \u003cli\u003eFollow OEM service intervals for oil changes and inspections\u003c\/li\u003e\n  \u003cli\u003eEnsure seals and gaskets are compatible when performing service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple 75W-90 Max Gear is aimed at owners and technicians of trucks, SUVs, 4x4s, passenger cars with hypoid gears, and marine lower units that require API GL-5 or GL-4 lubricants. It's well suited for fleet operators, performance enthusiasts and anyone who wants a synthetic gear oil designed to reduce wear, noise and heat in heavily loaded driveline applications. Always verify viscosity and API requirements in your owner's manual before installing.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple Max Gear 75W-90 compatible with GL-5 and GL-4 requirements?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It meets API GL-5 and GL-4 service categories and is suitable where those specifications are called for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to add any extra friction modifiers or additives?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Max Gear includes a built-in friction modifier and corrosion inhibitors, so no additional additives are required.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170613444951,"sku":"B00TO65GFK","price":153.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-gear-front-case.jpg?v=1790431828"},{"product_id":"royal-purple-hps-synthetic-motor-oil-5w-30-pack-of-6-quarts-high-performance-anti-wear-formula","title":"Royal Purple HPS Synthetic Motor Oil 5W-30 — Pack of 6 Quarts, High-Performance Anti-Wear Formula","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HPS 5W-30 is a high-performance synthetic motor oil engineered to protect and boost horsepower and torque in modified or out-of-warranty gasoline and diesel engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for drivers who demand more than conventional lubes, this HPS (High Performance Street) formulation combines Royal Purple’s Synerlec additive system with elevated zinc\/phosphorus anti-wear chemistry to shield critical engine parts under high load. Offered here as a convenient pack of six quarts, the 5W-30 viscosity balances cold-start flow with sustained protection at operating temperature, making it a versatile choice for a wide range of performance street applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil improve engine performance on the street?\u003c\/h3\u003e\n\u003cp\u003eThe HPS formula reduces metal-to-metal contact and enhances sealing between piston rings and cylinder walls, helping engines deliver smoother power and maintain torque under stress. Its additives are tuned to respond when pressure rises, thickening the lubricant film where and when the engine needs it most.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynerlec additive package improves film strength and friction control\u003c\/li\u003e\n  \u003cli\u003eHigh zinc\/phosphorus level gives strong anti-wear protection for cams and lifters\u003c\/li\u003e\n  \u003cli\u003eViscosity response under load helps sustain horsepower and torque\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this 5W-30 oil help with startup and fuel efficiency?\u003c\/h3\u003e\n\u003cp\u003eYes — 5W-30 strikes a balance between easy cold starts and stable viscosity at operating temperatures, so the engine receives protection immediately after ignition while avoiding excessive drag once warm. The cleaner additive system also helps reduce deposits that can hinder efficiency over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower cold viscosity for quicker oil flow on start-up\u003c\/li\u003e\n  \u003cli\u003eStable operating viscosity reduces parasitic drag at speed\u003c\/li\u003e\n  \u003cli\u003eCleansing additives help maintain combustion and component efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat types of engines and use cases is Royal Purple HPS 5W-30 suited for?\u003c\/h3\u003e\n\u003cp\u003eThis oil is formulated for performance-oriented street vehicles, including naturally aspirated and forced-induction gasoline engines and many diesel applications where a high-performance SAE 5W-30 is appropriate. It’s especially useful for cars that have been modified or are past factory warranty and need enhanced wear protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerformance street cars, modified engines, and tuned vehicles\u003c\/li\u003e\n  \u003cli\u003eGasoline and select diesel engines specifying 5W-30 service\u003c\/li\u003e\n  \u003cli\u003eOwners seeking improved wear protection and sustained performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does choosing the six-quart pack benefit maintenance planning?\u003c\/h3\u003e\n\u003cp\u003eBuying a six-quart multipack simplifies oil changes for many vehicles and keeps consistent lubrication chemistry on hand for scheduled maintenance. It also reduces the frequency of purchases and ensures every refill uses the same high-performance formulation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnough oil for multiple changes or one change on some larger-capacity engines\u003c\/li\u003e\n  \u003cli\u003eConsistent chemistry across all refills for performance stability\u003c\/li\u003e\n  \u003cli\u003eConvenient storage and cost-efficiency versus single bottles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Drivers who want more than stock motor oil — especially enthusiasts, owners of modified or high-mileage engines, and anyone out of factory warranty seeking enhanced anti-wear protection and performance consistency. If you need a 5W-30 oil that supports horsepower, reduces wear, and maintains viscosity under pressure, this Royal Purple HPS six-quart pack is a practical, performance-focused choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaximum wear protection\u003c\/li\u003e\n  \u003cli\u003eImproved performance\u003c\/li\u003e\n  \u003cli\u003eBetter efficiency\u003c\/li\u003e\n  \u003cli\u003eCleans engine internals\u003c\/li\u003e\n  \u003cli\u003eAdvanced protection under severe load\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Royal Purple HPS 5W-30 be used in turbocharged engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. HPS 5W-30 is compatible with many turbocharged gasoline and diesel engines that call for 5W-30, providing extra anti-wear protection under boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change the oil with HPS 5W-30?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Follow your vehicle manufacturer’s interval or your driving conditions; performance engines or severe use may require shorter intervals than standard recommendations.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170722529623,"sku":"B007SPVMDY","price":119.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-hps-5w30-front-bottle.jpg?v=1790433294"},{"product_id":"royal-purple-max-atf-high-performance-synthetic-automatic-transmission-fluid-1-qt-case-of-6-heat-wear-protection","title":"Royal Purple Max ATF High-Performance Synthetic Automatic Transmission Fluid, 1 qt. Case of 6 — Heat \u0026 Wear Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max ATF is a high-performance synthetic automatic transmission fluid engineered to reduce operating temperatures, increase film strength, and protect transmissions under heavy use.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for modern automatic transmissions, Royal Purple Max ATF combines synthetic base stocks and advanced additives to help control heat and wear. Transmissions produce significant heat during operation, and cooler fluid temperatures are linked to longer component life. Royal Purple Max ATF is formulated to be compatible with many factory fluids and is suitable for passenger vehicles where a high-performance ATF is recommended.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max ATF lower transmission temperatures?\u003c\/h3\u003e\n\u003cp\u003eMax ATF uses a synthetic formulation and high film-strength additives that reduce friction-related heat. By improving fluid stability and heat transfer, it helps keep operating temperatures lower than conventional fluids.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced synthetic base stocks for improved thermal stability\u003c\/li\u003e\n  \u003cli\u003eHigh film strength additives that reduce metal-to-metal wear\u003c\/li\u003e\n  \u003cli\u003eFormulation designed to resist oxidation at elevated temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fluid work with my vehicle’s factory ATF?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple Max ATF is designed to be fully compatible with many factory automatic transmission fluids and may be mixed if needed. For the cleanest results and best performance, the manufacturer recommends draining or performing a flush before filling with Max ATF.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with common automatic transmission fluid specifications\u003c\/li\u003e\n  \u003cli\u003eMixable with other ATFs in a pinch, though full replacement is preferred\u003c\/li\u003e\n  \u003cli\u003eSuitable for multiple passenger vehicle types where ATF is specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect after switching?\u003c\/h3\u003e\n\u003cp\u003eDrivers typically see improved thermal control and reduced wear, which can translate to more consistent shifting and potentially longer transmission life. Benefits depend on prior fluid condition and driving habits, so results vary by vehicle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReduced operating temperatures for better longevity\u003c\/li\u003e\n  \u003cli\u003eImproved film strength for wear protection under load\u003c\/li\u003e\n  \u003cli\u003eEnhanced stability to resist breakdown over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use Max ATF for best results?\u003c\/h3\u003e\n\u003cp\u003eFor ideal performance, drain or perform a transmission fluid flush before filling with Royal Purple Max ATF. Follow your vehicle manufacturer’s capacity and refill guidelines, and check fluid level and condition after the initial service interval.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrain or flush the existing ATF prior to fill when possible\u003c\/li\u003e\n  \u003cli\u003eFill to the manufacturer’s specified capacity and check levels\u003c\/li\u003e\n  \u003cli\u003eMonitor fluid condition periodically and top up with Max ATF as needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple Max ATF is aimed at vehicle owners and professional technicians looking for a synthetic automatic transmission fluid that emphasizes heat control and wear protection. It’s well suited for passenger cars and light trucks where a high-performance ATF is acceptable, and for anyone wanting an upgrade from conventional fluids to support longer transmission life and more stable operation under demanding conditions.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Royal Purple Max ATF be mixed with my existing ATF?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it is compatible and can be mixed with many automatic transmission fluids, though a full drain or flush is recommended for best results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much does switching to Max ATF help transmission life?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Max ATF helps reduce fluid temperatures and wear, which can extend life, but exact gains depend on vehicle condition and driving habits.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55170964717911,"sku":"B00ELHT5JA","price":146.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-max-atf-front-label.jpg?v=1790435714"},{"product_id":"royal-purple-max-cycle-10w-40-synthetic-motorcycle-oil-1-qt-case-of-6-wet-clutch-safe-high-film-strength","title":"Royal Purple Max-Cycle 10W-40 Synthetic Motorcycle Oil — 1 Qt Case of 6, Wet‑Clutch Safe, High Film Strength","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max-Cycle 10W-40 is a high-performance synthetic motorcycle oil engineered to protect stressed 4-cycle engines and wet-clutch transmissions while improving film strength and thermal stability.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for both air- and liquid-cooled bikes, Royal Purple Max-Cycle blends select synthetic base stocks with the brand’s Synerlec additive technology to deliver enhanced load-carrying ability, shear stability, and oxidation resistance. It meets and surpasses current API and JASO standards, works with other synthetic or mineral oils, and requires no flushing before switching. The result is smoother operation, reduced wear on critical components, and reliable performance across varied riding conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max-Cycle protect high-stress motorcycle engines?\u003c\/h3\u003e\n\u003cp\u003eMax-Cycle builds a stronger lubricating film than many competing synthetics and mineral oils, which helps shield pistons, crankshafts, and valve train parts from metal-to-metal contact. Its advanced additives reduce scuffing and improve load tolerance under heavy throttle or towing conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynerlec additive chemistry increases load-carrying capacity 3–4× versus typical synthetics\u003c\/li\u003e\n  \u003cli\u003eHigh film strength protects pistons and crankshaft bearings\u003c\/li\u003e\n  \u003cli\u003eImproved shear stability keeps viscosity consistent under stress\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work with wet clutches and motorcycle gearboxes?\u003c\/h3\u003e\n\u003cp\u003eYes — Max-Cycle is formulated for motorcycles with integrated wet-clutch transmissions and provides the friction characteristics needed to prevent clutch slip. It’s compatible with common gearboxes and won't require you to change transmission components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpecifically suitable for wet-clutch systems and 4-cycle gearboxes\u003c\/li\u003e\n  \u003cli\u003eCompatible with other synthetic and mineral oils for easy switching\u003c\/li\u003e\n  \u003cli\u003eNo pre-flush required when changing from another oil type\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this oil improve engine longevity and operating temperature?\u003c\/h3\u003e\n\u003cp\u003eThe synthetic base stocks and protective additives reduce parasitic power loss and keep components running cooler under load. Oxidation resistance helps maintain oil integrity over longer intervals, minimizing deposits and sludge that accelerate wear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuperior rust and corrosion protection preserves metal surfaces\u003c\/li\u003e\n  \u003cli\u003eCooler operation reduces thermal stress on engine parts\u003c\/li\u003e\n  \u003cli\u003eOxidation resistance supports longer-lasting performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance claims and specifications does Max-Cycle meet?\u003c\/h3\u003e\n\u003cp\u003eMax-Cycle exceeds current API and JASO motorcycle oil standards, delivering performance beyond many conventional synthetics and mineral oils. Royal Purple’s lab formulations emphasize shear stability, film strength, and load protection rather than simply meeting minimum specs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExceeds API and JASO warranty requirements\u003c\/li\u003e\n  \u003cli\u003eEngineered for both air- and liquid-cooled 4-cycle engines\u003c\/li\u003e\n  \u003cli\u003eFormulated to reduce piston scuffing and improve load resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Riders, mechanics, and fleet managers who demand durable, high-load lubrication for performance or heavily used motorcycles. If you operate sportbikes, cruisers, or touring machines with integrated wet-clutch transmissions and need reliable protection under heat and stress, this case of six 1‑quart bottles offers professional-grade coverage for frequent changes, track days, or multi-bike maintenance schedules.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix Max-Cycle with my current motor oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Max-Cycle is compatible with most synthetic and mineral oils, so a direct changeover is acceptable without flushing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this oil suitable for both air-cooled and liquid-cooled engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It’s formulated for use in both air- and liquid-cooled 4-cycle motorcycle engines and wet-clutch transmissions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55171012460887,"sku":"B00ELHT5JU","price":131.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-quart-bottle.jpg?v=1790436673"},{"product_id":"royal-purple-synthetic-motor-oil-sae-5w-40-1-quart-case-of-6-api-licensed-high-performance-protection","title":"Royal Purple synthetic motor oil SAE 5W-40 — 1 Quart Case of 6, API-licensed high-performance protection","description":"\u003cstrong\u003eRoyal Purple SAE 5W-40 is a fully synthetic, API-licensed engine oil engineered to reduce wear and maintain stable viscosity across cold starts and operating temperatures.\u003c\/strong\u003e\n\n\u003cp\u003eThis 1-quart, six-pack of Royal Purple (06540-6PK) SAE 5W-40 is a high-performance synthetic motor oil formulated for modern gasoline and diesel engines. It blends premium base stocks with Royal Purple's proprietary additives to help protect moving parts, support fuel economy, and preserve emission systems. The formula meets API SN, ILSAC GF-5, and Dexos1 performance criteria, and is compatible with conventional and other synthetic oils for straightforward upgrades.\u003c\/p\u003e\n\n\u003ch3\u003eHow does SAE 5W-40 perform in cold starts and high temperatures?\u003c\/h3\u003e\n\u003cp\u003eSAE 5W-40 is designed to flow at low temperatures like a 5-weight oil while providing the thicker protection of a 40-weight oil at operating temperature. That dual-rating helps ensure rapid oil circulation during cold starts and consistent film strength when the engine is hot.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e5W rating ensures easier cold-crank flow and faster lubrication on startup\u003c\/li\u003e\n  \u003cli\u003e40 rating maintains protective viscosity at normal operating temperatures\u003c\/li\u003e\n  \u003cli\u003eSynthetic base stocks resist thinning under high heat better than conventional oils\u003c\/li\u003e\n  \u003cli\u003eHelps reduce wear during temperature extremes by preserving lubricating film\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work with my engine and existing oil?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple SAE 5W-40 is API-licensed for gasoline and diesel applications and is compatible with mineral or other synthetic oils, so you can top up or switch without special procedures. Always confirm the recommended oil viscosity and specifications in your vehicle owner's manual before using a different grade.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets API SN and industry performance standards including Dexos1 and ILSAC GF-5\u003c\/li\u003e\n  \u003cli\u003eSafe to mix with conventional or synthetic oils if needed\u003c\/li\u003e\n  \u003cli\u003eRecommended to wait until the first scheduled oil change in a new engine before switching\u003c\/li\u003e\n  \u003cli\u003eAppropriate for many modern passenger cars, light trucks, and some diesel applications—check manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect from Royal Purple synthetic oil?\u003c\/h3\u003e\n\u003cp\u003eThis formula focuses on protection, cleanliness, and efficiency rather than promises of specific mileage gains. Users typically find improved wear resistance, better protection for emission-control components, and enhanced stability under stress compared with many conventional oils.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngine wear protection through robust additive chemistry\u003c\/li\u003e\n  \u003cli\u003eSupport for catalytic and emission systems by controlling deposits\u003c\/li\u003e\n  \u003cli\u003eImproved compatibility with ethanol-blended fuels to reduce corrosion risk\u003c\/li\u003e\n  \u003cli\u003ePotential for modest fuel-efficiency improvements due to lower internal friction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I store and handle this case of oil?\u003c\/h3\u003e\n\u003cp\u003eKeep the six-quart case in a cool, dry place away from direct sunlight and sources of ignition. Seal any opened containers firmly and use within the vehicle manufacturer's recommended oil-change interval.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStore upright at stable room temperatures, out of direct sunlight\u003c\/li\u003e\n  \u003cli\u003eDispose of used oil at authorized recycling centers—do not pour down drains\u003c\/li\u003e\n  \u003cli\u003eUse appropriate funneling tools to avoid spills when pouring\u003c\/li\u003e\n  \u003cli\u003eLabel remaining containers with date opened for maintenance tracking\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: This six-count pack of Royal Purple SAE 5W-40 is aimed at vehicle owners and fleet managers who want a premium synthetic oil that meets modern API and OEM performance specifications. It's suitable for drivers seeking stronger protection during cold starts and high-temperature operation, owners of gasoline and light-duty diesel engines that call for a 5W-40 or equivalent, and technicians who prefer a high-quality synthetic that mixes safely with existing oils.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix Royal Purple SAE 5W-40 with my current oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Royal Purple is compatible with mineral and other synthetic oils and can be mixed if necessary, though full replacement is preferred for consistent performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil meet manufacturer performance specs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This formula is API SN licensed and meets ILSAC GF-5 and Dexos1 performance requirements for many modern engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55171418325335,"sku":"B00ELHTFUO","price":112.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-label-1qt.jpg?v=1790444747"},{"product_id":"royal-purple-high-mileage-5w-20-synthetic-motor-oil-5-quart-synerlec-anti-wear-seal-conditioner","title":"Royal Purple High-Mileage 5W-20 Synthetic Motor Oil — 5 Quart, Synerlec anti-wear \u0026 seal conditioner","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple HMX w\/Synerlec 5W-20 is a premium synthetic motor oil formulated to protect high-mileage engines by reducing wear, revitalizing seals, and improving oil film strength.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for engines with significant miles on the clock, this 5-quart SKU combines fortified zinc\/phosphorus anti-wear chemistry and Royal Purple’s Synerlec® additive technology. The formulation targets common high-mileage issues—excessive oil consumption, worn components, and deposit buildup—while providing strong oxidation resistance to support longer drain intervals when used per manufacturer recommendations.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil reduce wear in older engines?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple HMX is boosted with robust zinc and phosphorus anti-wear agents that form a protective barrier on metal surfaces. Synerlec® complements that protection by strengthening the oil film and lowering friction at contact points, which helps limit metal-to-metal wear during operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh zinc\/phosphorus additive package for surface protection\u003c\/li\u003e\n  \u003cli\u003eSynerlec® reinforces oil film to reduce friction\u003c\/li\u003e\n  \u003cli\u003eTargets start-up and operating wear to extend component life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it help engines that are burning oil or have stiff seals?\u003c\/h3\u003e\n\u003cp\u003eThe formula includes seal-conditioning components intended to soften and rejuvenate hardened seals common in high-mileage engines. Restoring seal pliability can reduce seepage and lower oil consumption, though results vary with seal condition and engine history.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSeal revitalizers to address hardened rubber and reduce leaks\u003c\/li\u003e\n  \u003cli\u003eChemistry aimed at decreasing oil burn-off in older engines\u003c\/li\u003e\n  \u003cli\u003eHelpful for engines showing mild to moderate oil consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDoes Royal Purple HMX 5W-20 keep engines cleaner and extend oil life?\u003c\/h3\u003e\n\u003cp\u003eYes—detergents and dispersants in the blend remove and suspend deposits so they can be captured by the filter. The Synerlec® package also improves oxidation stability, which helps the oil resist breakdown and maintain performance over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDetergents lift deposits for cleaner internal surfaces\u003c\/li\u003e\n  \u003cli\u003eEnhanced oxidation resistance supports longer drain intervals\u003c\/li\u003e\n  \u003cli\u003eReduced sludge and varnish formation for consistent operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this oil compatible with modern gasoline engines and technologies?\u003c\/h3\u003e\n\u003cp\u003eRoyal Purple HMX 5W-20 is formulated to work with contemporary gasoline engines that specify 5W-20 viscosity. It’s designed to protect components and complement modern engine materials, though always follow vehicle manufacturer recommendations for oil specifications and change intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets typical 5W-20 application needs for many gasoline engines\u003c\/li\u003e\n  \u003cli\u003eSuitable with modern engine materials when OEM specs allow\u003c\/li\u003e\n  \u003cli\u003eWorks with existing seals, gaskets, and emission-related systems when used correctly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple HMX w\/Synerlec 5W-20 is aimed at drivers and technicians caring for higher-mileage gasoline engines who want a premium synthetic oil that prioritizes wear protection, seal rejuvenation, and deposit control. It’s a fit for owners seeking improved oil film strength and oxidation resistance—especially when managing engines that show increased oil use or wear—while still adhering to manufacturer viscosity requirements.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Royal Purple HMX 5W-20 in an engine with over 100,000 miles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It’s formulated for high-mileage engines to reduce wear, rejuvenate seals, and manage oil consumption when 5W-20 is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this oil allow longer drain intervals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Its Synerlec® additive improves oxidation resistance, which can support extended drains, but follow your vehicle manufacturer’s service recommendations.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55171557949783,"sku":"B07NYTBP38","price":83.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-front-packaging-5qt.jpg?v=1790448120"},{"product_id":"royal-purple-0w-20-synthetic-motor-oil-1-quart-case-of-6-api-licensed-fuel-saving-protection","title":"Royal Purple 0W-20 Synthetic Motor Oil, 1 Quart (Case of 6) — API‑Licensed, Fuel‑Saving Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple SAE 0W-20 is a fully synthetic, API-licensed motor oil formulated to protect modern gasoline and diesel engines while helping improve fuel economy and reduce wear.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 1-quart, case-of-six pack of Royal Purple 06020-6PK delivers a low-viscosity 0W-20 synthetic oil designed for contemporary engines that call for lightweight lubricant performance. Unlike conventional mineral oils, this fully synthetic formula uses premium base stocks and proprietary additive technology to maintain film strength at high temperatures, flow quickly at cold starts, and support emission systems and ethanol-blended fuels. Always confirm your vehicle manufacturer’s recommended viscosity before switching oils.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Royal Purple 0W-20 perform during cold starts and hot operation?\u003c\/h3\u003e\n\u003cp\u003eThe SAE 0W rating means the oil flows readily at low temperatures, reducing startup drag and letting critical parts receive lubrication faster. At normal operating temperature it performs like a 20-weight oil to maintain protective film thickness and resist breakdown under heat.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRapid cold-temperature flow to protect bearings and valvetrain at startup\u003c\/li\u003e\n  \u003cli\u003eStable viscosity at operating temperature for consistent protection\u003c\/li\u003e\n  \u003cli\u003eSynthetic base oils resist thermal breakdown better than crude-derived oils\u003c\/li\u003e\n  \u003cli\u003eAdditives help control deposits and maintain clean surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil mix with my current lubricant if I switch brands or grades?\u003c\/h3\u003e\n\u003cp\u003eYes — Royal Purple 0W-20 is fully compatible with conventional and other synthetic motor oils, so no flushing is required when upgrading. For new engines, the brand recommends waiting until the first scheduled oil change to switch to Royal Purple for best initial protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with mineral and synthetic oils for straightforward changeovers\u003c\/li\u003e\n  \u003cli\u003eNo special draining procedure beyond normal oil change steps\u003c\/li\u003e\n  \u003cli\u003eRecommended to follow manufacturer intervals when changing oil types\u003c\/li\u003e\n  \u003cli\u003eAPI SN licensing ensures baseline compatibility and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat protection and benefits can I expect from Royal Purple’s formula?\u003c\/h3\u003e\n\u003cp\u003eThis oil combines premium base stocks with Royal Purple’s proprietary additives to target wear reduction, fuel economy, and emission system durability without making medical or guaranteed performance promises. It is engineered to meet industry specifications like ILSAC GF-5 and Dexos1 and to protect catalytic converters and other aftertreatment components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnhanced wear protection for critical engine components\u003c\/li\u003e\n  \u003cli\u003ePotential for improved fuel efficiency due to low viscosity\u003c\/li\u003e\n  \u003cli\u003eFormulated to protect catalytic emission systems and ethanol-blend compatibility\u003c\/li\u003e\n  \u003cli\u003eSuperior corrosion resistance to help preserve engine parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This case-of-six quarts suits DIY mechanics, small fleets, and drivers who prefer to keep multiple oil changes on hand. It’s intended for gasoline and diesel vehicles that specify SAE 0W-20 or compatible viscosities and for owners who want a higher-performing synthetic alternative to conventional oils. Always check your owner’s manual for viscosity and API specification requirements before use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Royal Purple 0W-20 compatible with other oils?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It mixes with conventional and synthetic oils, so no special flushing is required beyond a normal oil change.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this oil meet industry specifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is API SN licensed and meets ILSAC GF-5 and Dexos1 performance requirements for many modern engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":55171818226007,"sku":"B00ELHTA72","price":114.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/royal-purple-0w20-front-quart.jpg?v=1790449552"}],"url":"https:\/\/britishgarage.co.uk\/collections\/royal-purple.oembed","provider":"British Garage","version":"1.0","type":"link"}