ValvTect® Gas Additive With Friction Modifier 16oz. An advanced high performance gasoline additive designed to protect fuel systems from problems caused by ethanol gasoline (up to E85) and non-ethanol gasoline. Helps gasoline powered engines operate at peak performance by cleaning up deposits and keeping the engine & fuel system in "like new" condition. Can reduce fuel consumption, improve acceleration, improve engine octane performance & lower harmful exhaust emissions. Cleans up fuel injectors, combustion chamber, intake valves, ports, carburetor & manifold deposits. Prevents fuel filter plugging & helps extends fuel filter life.