Lucas Synthetic SAE 50 wt. Motorcycle Oil is blended with the highest quality synthetic base oils and our exclusive high performance additives. Designed for all 4-stroke air-cooled V-Twin/Opposed Twin/Slant Twin engines made after 1984. Lucas Synthetic SAE 50 wt. Motorcycle Oil provides excellent thermal stability, resists oil oxidation, reduces operating temperatures, reduces wear, and extends oil drain intervals and engine life. Our product helps your engine run cooler, smoother and longer.