Part Description: Sea Foam 16oz Bottle: A specialized formula that can be used to both treat fuel and crankcase. When added to the gas tank Sea Foam cleans injectors as well as carburetors. It can be used in gas or diesel engines and stabilizes fuel up to 2 years. When added to the crankcase, intake valves and engine chambers will be cleaned of harmful deposits by liquefying them. When adding Sea Foam to the crankcase it will lubricate the upper cylinders and is safe with all types of oils that are conventional and synthetic.