is all you need to fix problems related to ethanol added fuels. Its synthetic blend removes water, stops fuel system corrosion and ethanol phase separation that robs fuel of octane. Ethanol Equalizer replaces lost octane, increases horsepower, stabilizes fuel for extended storage and increases fuel mileage. One 4 oz. bottle treats up to 40 gallons. This product is EPA registered. Available in 1 oz., 4 oz., 16 oz., 32 oz. and 1 Gallon bottles.