DEGUMMED RACING CASTOR! Formulated with the purest, degummed castor oil available. Blended with the most advanced additives to: Eliminate ring sticking Reduce carbon & varnish formation protect against rust & corrosion Eliminate sparkplug fouling The ideal lubricant for gasoline, alcohol and nitro fuels. Castor oil is a natural extreme pressure lubricant, which results in extended engine life. Burris Hi-Rev Castor also makes a great TOP end lube for engines that run on "GAS, METHANOL, AND NITRO"