Gold Eagle Marine STA-BIL Fuel Stabilizer is the best ethanol problem fighter. This is more than four times the fuel system cleaner than the regular STA-BIL and double the corrosion fighter. Marine STA-BIL prevents corrosion from moisture and ethanol-induced water attraction. If you are using ethanol blended fuel in your marine application, Gold Eagle recommends Marine STA-BIL with EVERY fill up, not just for storage. This 32 ounce quick measure easy pour bottle treats up to 320 gallons of fuel.