Engines with over 75 000 miles can suffer from extensive carbon deposits and excess friction. Gumout® Regane® High Mileage Fuel System Cleaner reduces friction in the upper cylinder to improve fuel economy while using P.E.A. (polyetheramine) to effectively remove deposits other products can t for restored performance P.E.A. is a nitrogen-based detergent stable enough to survive the harsh conditions of a combustion chamber. It is the most potent detergent available for cleaning carbon deposits in fuel systems and the only cleaning agent that has been proven to clean the combustion chamber piston tops and cylinder heads. P.E.A. also cleans ports valves and GDI and port injectors and keeps them clean for up to 3 000 miles. CLEANS GDI/direct and port/indirect fuel injectors intake valves and ports piston tops cylinder heads combustion chamber CONDITIONS Fuel to fight ethanol and water corrosion upper cylinder to reduce friction and wear PREVENTS Future carbon buildup BEST FOR Restored performance and fuel economy in high mileage vehicles with one fill-up reduced emissions