Lucas Octane Booster - A Real Octane Booster! Tested and proven to deliver three times more boost than most other brands. Lucas Octane Booster is a GENUINE Performance Enhancer! One 15 oz. bottle treats up to 25 gallons of fuel. Not street legal. Key Benefits Safe for turbos, oxygen sensors and catalytic converters Suitable for use in fuel injected and carbureted engines Provides more boost than most other brands Promotes clean fuel burn for fewer emissions