Burris Hi-Rev Castor – DEGUMMED RACING CASTOR!! Formulated with the purest degummed castor base oils available and blended with the most advanced additives to eliminate ring sticking, reduce carbon & varnish formation, protect against rust & corrosion and eliminate sparkplug fouling. Burris Hi-Rev Castor is the ideal lubricant for gasoline, alcohol and nitro fuels.