Schaeffer Manufacturing 9000-005 Supreme 9000 Full Synthetic Engine Oil, 5W-40, 5 gal Pail Improves engine durability without affecting fuel economy Keeps engines cleaner: minimal sludge, soot and carbon buildup Strong protection against wear, scuffing and abrasion  blended with friction modifiers Resists thinning at high temperatures Quickly lubricates in colder temperatures