Sea Foam High Mileage is specially formulated for gas cars and trucks over 75,000 miles. Use High Mileage to help minimize long-term wear and prevent rough engine performance in higher mileage vehicles. Sea Foam High Mileage is a blend of cleaning and lubricating petroleum ingredients that can be used SAFELY in all types of 2- and 4-stroke gas engines and all types of gasoline fuel and ethanol blends. High Mileage is ideally formulated to clean dirty fuel injectors and carb jets, intake valves, and chamber areas after years of harmful buildup. It helps resist the common problems that higher mileage vehicles face, like engine wear, oil burning, and rough performance.