{"product_id":"red-line-mt-85-75w-85-gl-4-manual-transmission-gear-oil-1-gallon-synchro-safe-synthetic","title":"Red Line MT-85 75W-85 GL-4 Manual Transmission Gear Oil — 1 Gallon, Synchro-Safe Synthetic","description":"\u003cp\u003e\u003cstrong\u003eRed Line MT-85 75W85 GL-4 is a high-performance manual transmission gear oil formulated to protect brass synchros, promote quicker shifting, and extend gearbox life in a wide range of manual-drive vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis full-synthetic GL-4 gear lubricant is designed for manual transmissions and transaxles where moderate extreme-pressure protection and conservative friction characteristics are required. MT-85 balances wear protection with the controlled slipperiness synchromesh systems need, making it a suitable choice for many domestic and import manuals, including performance and daily-driven cars.\u003c\/p\u003e\n\n\u003ch3\u003eWill this gear oil protect my synchros and gears?\u003c\/h3\u003e\n\u003cp\u003eYes — MT-85 is formulated without the reactive sulfur compounds common to many GL-5 oils that can attack yellow metals. The blend provides durable film strength to reduce wear while preserving the controlled friction level that synchros require for smooth engagement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGL-4 formula safe for brass and bronze synchros\u003c\/li\u003e\n  \u003cli\u003eStable film reduces gear pitting and scuffing under load\u003c\/li\u003e\n  \u003cli\u003eRecommended where GL-1, GL-3 or GL-4 fluids are specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does MT-85 affect shift feel, especially in cold starts?\u003c\/h3\u003e\n\u003cp\u003eMT-85 delivers balanced friction properties that help reduce shift effort and improve synchronizer operation, even in lower temperatures. It is engineered to allow quicker, crisper shifts without making the gearbox overly slippery.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower cold-viscosity enables easier shifting at startup\u003c\/li\u003e\n  \u003cli\u003eOptimized slipperiness for fast, confident gear changes\u003c\/li\u003e\n  \u003cli\u003eMaintains consistent friction across operating temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and applications are best suited for this oil?\u003c\/h3\u003e\n\u003cp\u003eMT-85 is popular across a variety of manual-drive vehicles, from daily drivers to performance cars that require GL-4 protection. It is widely recommended for several Nissan models and commonly used in vehicles from Mitsubishi, Hyundai, Kia and other manufacturers with brass synchro designs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon fitment: Nissan 350Z, 370Z, many Maxima, Altima, Sentra models\u003c\/li\u003e\n  \u003cli\u003eUsed by enthusiasts in Mitsubishi Evo and other performance manuals\u003c\/li\u003e\n  \u003cli\u003eSuitable where specific synchromesh or GL-4 oils are called for\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits and maintenance advantages can I expect?\u003c\/h3\u003e\n\u003cp\u003eUsing MT-85 helps extend synchronizer life and reduce gear wear, which can lead to longer service intervals and fewer gearbox repairs. Its synthetic base resists breakdown, maintains viscosity, and protects surfaces under heavy loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eImproves gear protection and extends synchro life\u003c\/li\u003e\n  \u003cli\u003eHelps maintain shift quality over time\u003c\/li\u003e\n  \u003cli\u003eSynthetic stability reduces thermal and oxidative degradation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Red Line MT-85 75W85 GL-4 gear oil is aimed at drivers who need a dependable manual-transmission lubricant that protects brass synchros and keeps shifts quick and consistent. It’s a solid choice for performance enthusiasts, owners of specified Nissan, Mitsubishi, Hyundai and Kia manuals, and anyone seeking a synthetic GL-4 option where original-equipment recommendations call for a synchromesh-friendly fluid.\u003c\/p\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: Is MT-85 safe for brass synchros?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. MT-85 is a GL-4 formulation free of reactive sulfurs and is appropriate for brass and bronze synchros.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use MT-85 in cold climates?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Its 75W cold-rating and synthetic base help provide easier shifting and consistent performance in lower temperatures.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Red Line","offers":[{"title":"Default Title","offer_id":55171171877207,"sku":"B019XB6FQO","price":144.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/red-line-mt-85-front-label.jpg?v=1790439991","url":"https:\/\/britishgarage.co.uk\/products\/red-line-mt-85-75w-85-gl-4-manual-transmission-gear-oil-1-gallon-synchro-safe-synthetic","provider":"British Garage","version":"1.0","type":"link"}