America's top-selling fuel stabilizer. Use STA-BIL Fuel Stabilizer in any gasoline-powered vehicle or equipment you plan to store for 30 days or longer. It keeps the fuel fresh for up to 12 months during storage, eliminating the need to drain your tank. Works effectively in all gasoline blends, including ethanol-blended fuel, up to E-85. Perfect for collector cars, generators, lawn mowers, snow blowers, etc. Keeps fuel fresh for up to 12 months during storage. Eliminates the need to drain fuel prior to storage. Ensures quick, easy starts after storage. Prevents gum and varnish build-up. Effective in all gasoline, including ethanol blends. For all gasoline engines, including 2-cycle. Use in all gasoline-powered equipment that is infrequently used or stored for longer than 30 days - including collector cars, boats, generators, lawnmowers, and other seasonal equipment.