Sea Foam Motor Treatment is a 100% pure petroleum product that safely and effectively cleansinternal fuel and oil system components, helping your gasoline or diesel engine run Cleaner and more efficiently. SEA FOAM is an EPA-registered product, and will not harm engine components, seals, gaskets, catalytic converters or oxygen sensors. Sea Foam works in carbureted or fuel injected engines on cars, trucks, tractors, motorcycles,marine, small engines, industrial, and diesel engines.