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Every order ships free with tracking. Dispatch is usually within 1–2 working days and delivery within 3–8 working days.
Email us your order number within 30 days of delivery and we send the return steps the same working day. Refunds within 5 working days of receipt.
Send your registration or make, model and year to britishgarage.co.uk@gmail.com and we check the listing details against it before you order.
If you drive a performance-oriented vehicle and expect crisp throttle response and confident acceleration, the right fuel treatment can help. 104+ Performance Octane Boost is formulated to increase effective octane rating, remove injector and combustion chamber buildup, and minimize pinging and hesitation that spoil spirited drives. Each 16 oz bottle treats up to 18 gallons of gasoline and this listing is for a convenient 6-pack for repeat use or multiple vehicles.
The formula raises the fuel's resistance to premature detonation, which is what causes knock and pinging under load or high compression. By increasing octane equivalence and cleaning carbon deposits from combustion surfaces, the additive supports smoother, more consistent combustion.
While results vary by engine condition and tuning, many drivers notice sharper throttle response, fewer hesitation events, and modest fuel-efficiency gains after using an octane boost that also cleans injectors. This product targets both combustion quality and fuel delivery to help the engine run more effectively.
This formulation is designed to be compatible with catalytic converters and oxygen sensors when used according to instructions. It avoids chemicals known to harm modern aftertreatment components, but always follow dosing directions and avoid overuse.
Pour the full 16 oz into a nearly full 15–18 gallon tank before refueling finishes to ensure proper mixing. Frequency depends on driving style and fuel quality; many owners add it before spirited drives or as a periodic maintenance dose to keep injectors clean.
Who is this for: 104+ Performance Octane Boost is made for drivers of performance cars, tuned engines, classic muscle cars, and any gasoline-powered vehicle prone to knock or loss of throttle sharpness. It’s especially useful for owners who tune their engines near the edge of stock octane limits, those who want to maintain injector cleanliness between services, and enthusiasts who want consistent, confident power delivery during spirited driving. Avoid using additives in ways that contradict your vehicle manufacturer's instructions.
Q: Will one 16 oz bottle work for my 12-gallon tank?
A: Yes. One 16 oz bottle treats up to 18 gallons, so it will properly dose a 12-gallon tank when used as directed.
Q: Can I use this with turbocharged engines?
A: Yes. It’s formulated to raise octane and clean injectors in turbocharged and naturally aspirated gasoline engines when dosed correctly.
Delivery: free tracked delivery to every UK postcode on every order. Most orders are dispatched within 1–2 working days and arrive within 3–8 working days; you receive a tracking link by email as soon as it ships.
Returns: 30 days from delivery to return any unused item in its original packaging. Email us with your order number and we send the return instructions the same working day. Refunds go back to your original payment method within 5 working days of the item arriving with us.
Faulty or wrong item? Tell us within 30 days and we replace or refund it, including the return postage.
Seasonal UK driving advice and a heads-up when new stock lands. No spam, unsubscribe any time.
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