Liqui Moly 4T Mineral 20W-50 Street Engine Oil 4LHigh performance motor oil based on selected mineral oils. Ensures optimum performance and protection of the engine under all operating conditions. Reliable lubrication, optimum noise damping and low wear are just as much par for the course as gentle clutch engagement and disengagement and gear shifting. Tested on engines with catalytic converters. Developed for air and water cooled 4 stroke engines exposed to normal to tough operating conditions.