Upper Lube is a high-temperature cylinder lube that protects and extends engine life. Added directly to the fuel, Upper Lube reduces fuel wash down, chalky residue, and corrosion, while lubricating cylinders, valves, guides, and fuel system components. It mixes thoroughly, won't separate from fuel, leaves no varnish residue, and does not contain a flame agent. One 16 oz. bottle treats 55 gallons of alcohol, 150 gallons of gasoline, or 110 gallons of ethanol.