- - Racing Synthetic - - Recommended for power valve engines - - Identifiable Klotz red...Smells like Klotz - - Improves throttle response - - Extreme film strength protects engine parts from metal-to-metal contact - - Clean Burn™ for low smoke and prevents plug fouling - - High temperature stability reduces power valve deposits - - Blends with gasoline only - - Pre-mix only - Not intended for oil injection - -