Star Tron Enzyme Fuel Treatment is a fuel additive which uses a unique enzyme that allows engines to start easily and run smoothly, even when using ethanol-blended fuel or after sitting idle for months. Star Tron allows fuel to burn more completely, which results in maximum performance, fuel efficiency, and reliable operation. Star Tron will stabilize fuel for up to two years, preventing the formation of gums and other solids that clog carburetors and fuel injectors. Star Tron helps prevent phase separation by dispersing water throughout fuel as submicron-sized droplets that can be safely eliminated while the engine operates. Ideal for use in all gas engines including boats, cars, trucks, motorcycles, and small equipment. 1 fl. oz. treats 6 gallons of fuel.