Lucas Motorcycle Octane Booster - A Real Octane Booster! Tested and proven to deliver three times more boost than most other brands. Lucas Motorcycle Octane Booster is a GENUINE Performance Enhancer! Tested and proven to deliver three times more boost than most other brands. It's safe for turbos, oxygen sensors and catalytic converters. Stops knocks, and raises MPG in high compression engines.One 15 oz. bottle treats up to 25 gallons of fuel. Not street legal.