The Sea Foam Motor Treatment – 16 oz. is especially designed to be the one-step solution to all your engine-related hassles. A safe and versatile additive that is compatible with 2-cycle, 4-cycle, rotary and diesel engines, this can be added to fuel or directly to combustion chambers. The unique formula helps clean deposits, injectors and carb jets. It works effortlessly on all kinds of vehicles, including cars, trucks, tractors and boats to ensure a smooth and fuss-free ride. Pour Sea Foam in your fuel tank to clean & lubricate your entire fuel system. Safe & effective when used in all gasoline or diesel engines – just pour it in!