Prestone 0-60 Octain Booster is a 2-in-1 formula that boosts octane by up to 10 points to quickly eliminate engine knock. It also cleans injectors to help restore lost fuel efficiency, power, and performance. In regular unleaded gasoline, one point is equal to 0.1 octane number [(R+M)/2]. Higher octane levels help restore power and acceleration lost when the engine timing is retarded under knock conditions. This street-legal formulation delivers the highest amount of MMT octane booster allowed by law. Treats up to 16 gallons.