- - Racing Castor - - Identifiable Klotz red...Smells like Klotz - - Improves throttle response - - Extreme film strength protects engine parts from metal-to-metal contact - - Clean Burn™ Technology - - Blends with methanol alcohol, ethanol, nitromethane, gasoline and E-85 - - Pre-mix only above 30 degree F - Not intended for oil injection - -