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! It's safe for turbos, oxygen sensors and catalytic converters. Stops knocks, and raises MPG in high compression engines.Also available for Motorcycles in 2 ounce bottle. Key BenefitsSafe 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 emissionsPackaging #10725 2 Ounce (Case of 18) 3.6 lbs #10930 5.25 Ounce (Case of 24) 10 lbs #10026 15 Ounce (Case of 12) 12.5 lbs Directions For Use5.25oz Bottle - Pour entire bottle into tank then fill with any gasoline grade. One bottle treats up to 15 gallons of fuel.15oz Bottle - Pour entire bottle into tank then fill with any gasoline grade. One bottle treats up to 25 gallons of fuel.