API SL Certified, Lucas Synthetic SAE 50W MC Oil is specially formulated with the finest base oils and exclusive Lucas high performance additives for all 4-stroke air cooled V-Twin/Opposed Twin/Slant Twin engines made after 1984. Lucas Oil has put all of its race bred technology into this oil to help your engine run cooler, smoother and longer. Road testing indicates significant reduction in operating temperature. Numerous testimonials support product performance.