Lucas Oil Marine Synthetic Gear Oil - 75W90 - 1qt. 10652Lucas M8 Synthetic SAE 75W 90 Marine Gear Oil is a pure synthetic, non foaming, super slick, long lasting lubricant designed especially for marine applications. Originally designed for high powered off shore racing boats, M8 Marine Gear Oil contains seal conditioners and an exclusive blend of synthetic additives that protect from rust and wear caused by both fresh water and salt water during long periods of storage. Excellent for use in any heavy duty