STP Octane Booster, 5.25 fluid ounces, 18040, Fuel Additive -1Count

STP Octane Booster is a high-performance fuel additive designed to increase the octane level, helping improve engine performance, reduce knocking, and restore lost power. It promotes cleaner combustion and better throttle response, and is suitable for all gasoline engines. Easy to use—simply add it directly to the fuel tank for immediate performance improvement.