Penray 2112 Fuel Injector Cleaner - 12-Ounce Bottle For use in Direct Injection (GDI,) Multi-Port (MPFI,) and Throttle Body (TBI) Injection Systems One Treatment Can Provide Increased Fuel Economy, Power and Acceleration, Improved Idling, Quicker Starting and Reduced Emissions Helps Clean Harmful Deposits and Carbon from Fuel System to Restore Performance For Use In All Grades of Gasoline and Ethanol Blends Safe for Catalytic Converters and Oxygen Sensors