Iso-Heet(R) works in just about any engine type you can imagine: 2-cycle, 4-cycle, gasoline, diesel, fuel-injected, carbureted, automobile, motorcycle, and marine, it does it all! Iso-Heet(R) is suitable for year-round use, it gets water out of fuel in warm, wet weather, allows for quicker, easier starting in the winter, and cleans fuel injectors all year round. | Heet Iso- Premium Fuel-Line Antifreeze | Size 12 oz