Star Tron Enzyme Fuel Treatment uses unique enzyme technology to improve overall fuel quality. Star Tron Gasoline Formula makes engines start easily and run smooth. It “cures & prevents” Ethanol fuel problems such as water in fuel, or lost power. It also helps prevent phase separation, removes gums, varnish and carbon deposits and will stabilize gasoline for up to 2 years. It works in boats, cars, motorcycles, small equipment or any other 2 or 4-cycle engine.