Lucas M8 Synthetic SAE 75W-90 Marine Gear Oil is a pure synthetic, super slick, and long-lasting lubricant designed especially for marine applications. Originally designed for high powered offshore racing boats, M8 Marine Gear Oil contains seal conditioners and an exclusive blend of synthetic additives that protect from rust and wear caused by freshwater and saltwater during long periods of storage. Excellent for use in any heavy-duty, high performance sterndrives, V-drives, gear boxes, wheel bearings, and superchargers. Fortified with anti-foaming agents to prevent cavitation at high RPMs. Oil safely blends with other oils and additives.