Lucas 32 oz. Upper Cylinder Lubricant. It is a powerful blend of oils and additives that contain no solvents. Designed to increase power and fuel mileage while lowering exhaust emissions through a more complete combustion. It is formulated for both gasoline and diesel engines, carbureted or fuel injected. This blend of super slick oils and additives with a high detergent action allows the engine to operate at maximum efficiency. Cleans and lubricates the carburetor and injectors, causing the fuel to burn more thoroughly for increased power and less fuel consumption. It can be used in vehicles that require leaded fuel because it replaces the benefits of lead in gasoline without causing harmful emissions. It complies with federal low sulfur content requirements for use in diesel motor vehicles and non-road, locomotive, and marine diesel equipment engines.