Lucas 10003 Upper Cylinder Lubrication & Injector Cleaner 32 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. Also it cleans and lubricates the carburetor and injectors and causes the fuel to burn more thoroughly for increased power and less fuel consumption. Use it to pass smog tests. Finally it totally neutralizes the harmful effects of low sulfur diesel fuel. It complies with the federal low sulfur content requirements for use in diesel motor vehicles and non-road locomotive and marine diesel equipment engines.