This multi-purpose LUCAS OIL 10020 Fuel Treatment 5.25 Oz is formulated for both gasoline and diesel engines, carbureted or fuel injected. It gives your fuel system what it really needs, a blend of super slick oils and additives with a high detergent action that allows the engine to operate at maximum efficiency. LUCAS OIL fuel treatment cleans and lubricates the carburetor and injectors and causes the fuel to burn more thoroughly for increased power and less fuel consumption. It works well in vehicles that require leaded fuel, because it actually replaces the benefits of lead in gasoline without causing harmful emissions. Use this upper cylinder lubricant and injector cleaner to improve performance, reduce corrosion and maintenance over time and help your vehicle pass smog tests. It also totally neutralizes the harmful effects of low-sulfur diesel fuel.