Gasoline cleaning additive. Clean the entire fuel system for up to 5000 miles. Increases fuel mileage, restores performance, and virtually eliminates knocks and pings. Cleans pistons, rings, valves and restores performance. Advanced formula reduces harmful emissions in all street and off-road uses. For use in all 4-cycle and 2-cycle gasoline engines. 16 Oz. treats up to 20 gallons.