BG CF5 gasoline supplement is a unique, high-tech formulation designed to provide deposit control throughout the life of the engine. Added to vehicle fuel tank every 5,000 miles, BG CF5 will keep intake manifolds, intake ports, intake valves and combustion chambers clean and free of damaging deposits. Maintains "like-new" engine performance. It prevents rust and corrosion and provides long-term storage stability. Protects against the harmful effects of ethanol. One 11 oz. can treats 15 gallons (57 Liters) of fuel. Catalytic converter and oxygen sensor safe.