Gumout Regane Complete Fuel System Cleaner prevents future deposit build-up. It is safe for use in turbo and supercharged vehicles. Regane Complete Fuel System Cleaner cleans gasoline direct injection (GDI) systems too. It fights damaging effects of ethanol up to 15 percent (E15). It will maximize fuel economy and restore lost horsepower. Regane Complete Fuel System Cleaner removes water from gasoline and helps reduce emissions. It will not void OEM/manufacturer's warranty.