Use this it works great. 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.My wife's car has been sitting for a long time, due to her being ill. I wanted to syphon out about five gallons of old fuel and replace it with fresh fuel. The syphon hose would not reach the fuel.