Liquid HorsePower octane booster. Treats 5 gallons with just one little bottle. Not another snake oil, this stuff really works. - Relieves stress on engines caused by poor combustion - Increased power, lower emissions, better fuel mileage - Keeps fuel fresh during storage - Super concentrate for easy transportation - Cleans injectors, carburetors, intake valves, and combustion chambers - Lubricates top end. Recommended for use in all stock and modified gasoline engines whether carburated or injected and with or without catalytic converter and oxygen sensor.