STP Ultra 5-in-1 Fuel System Cleaner and Fuel Stabilizer&nbsp;(12 fl. oz.) Formulated to help save gas and lower emissions by deep cleaning the entire fuel system Formulated to help restore peak performance and reduce friction by lubricating engine parts Formulated to help prevent ethanol deposits and inhibit corrosion Works with modern gasoline engines such as turbo, direct inject and hybrid vehicles Compatible with cap-less gas systems