The Star brite 14301-4 is a Star-Tron Enzyme Fuel Treatment Classic Gas Formula that contains four 1 oz bottles. This treatment cures and prevents ethanol-related fuel problems while stabilizing gasoline for long-term storage in all gas engines, including boats, cars, motorcycles, lawn equipment, and generators. Its enzyme technology removes gum and varnish buildup, disperses moisture, and improves combustion efficiency.