Lucas upper cylinder lubricant is like a tune-up in a bottle! Whether you're running gas or diesel, carbureted or fuel-injected, it's compatible with your equipment and delivers a blend of oils, additives, and detergents that keeps your engines operating at peak efficiency. It cleans and lubricates the carburetor and injectors to allow them to burn fuel more thoroughly, which increases power while decreasing fuel consumption. It also helps engines pass smog and emissions tests, and it meets federal requirements for use with low-sulfur diesel fuels. | Lucas Oil Upper Cylinder Lubricant with Injector Cleaners | Size 5.25 oz