One step process: Just pour in the tank and go! This EPA and CARB compliant system cleans all fuel injector types in both gasoline and diesel engines. It inhibits corrosion that results from emulsified ethanol-containing fuel by reducing the rate at which ethanol emulsifies and oxidizes, and removes deposits from combustion chamber and intake valves. It also prevents rough idling, hesitation, and stalling, maximizing fuel economy and reducing emissions.