Star Tron Enzyme Fuel Treatment is a multifunctional fuel additive that cures and prevents ethanol fuel problems. It allows all engines, from the smallest 2-stroke outboard to the largest megayacht turbo diesel, start more easily and run more smoothly. Star Tron is the # 1 marine fuel treatment in the US because it allows hydrocarbon fuels to burn more completely for maximum performance, reduces harmful emissions, prevents carbon deposits and helps improve cruising range and fuel economy. It helps prevent phase separation by dispersing water throughout the fuel as submicron-sized droplets that are safely eliminated while the engine operates. Regular use will keep fuel injectors and carburetors clean. A year-round treatment, Star Tron also stabilizes fuel, making it ideal for use in winterized boats and can rejuvenate old, substandard fuel.