Sea Foam 16 oz. High Mileage Fuel Additive. It is added to fuel to clean fuel injectors and carburetor jets. It is added to crankcase oil to help clean and prevent the common causes of oil burning. It lubricates critical upper engine areas and reduces long-term engine wear. It is used regularly to prevent rough engine performance. It is safe for all gasoline fuels and all types of motor oil. It is specially formulated for gasoline cars and trucks over 75,000 miles.