Lucas Marine Fuel Treatment is designed specifically to address the issues watercraft owners experience with their engines and fuel systems. Lucas Marine Fuel Treatment fights corrosion, keeps fuel lines, carburetors or fuel injectors clean and free of deposits while lubricating and protecting vital engine parts. Powerful detergents, including polyether amines, improve cleanliness in the fuel system and internal engine parts. Its designed for gasoline and diesel engines, 4-stroke or 2-stroke. Upper cylinder lubricants insure smooth operation and longer engine life.