Synthetic SAE 75W-90 M8 Marine Gear Oil

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Marine Gear Oil Synthetic SAE 75W-90 M8

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Lucas 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 / high performance stern drives, v-drives, gear boxes, wheel bearings and superchargers.

Key Benefits

  • Fortified with anti-foaming agents to prevent cavitation at high RPM's
  • Safely blends with all other known gear oils and additives
  • Protects against rust and moisture during long periods of storage
  • Provides rust and corrosion protection in both fresh water and salt water environments
  • Effective Water Resistance
  • Long Lasting
  • Resist Extreme Pressure
  • Extreme Friction Reducer


  • #10652 - 1 Quart (Case of 12) - 25 lbs
  • #10664 - 5 Gallon Pail (1 Pail) - 40 lbs


Product Spec Sheet Technical Data Sheet
Safety Data Sheet Safety Data Sheet

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Mark Uses Lucas Heavy Duty Oil Stabilizer in Every Vehicle

"I have used the heavy duty oil additive in every vehicle that I own, 1988 Suzuki Samurai with 200,000 miles, 1996 Suzuki Sidekick with 147,000 miles, 2002 Dodge Ram 1500 with 237,000 miles and a 2008 Dodge Grand Caravan with 157,000 miles. Recently my Truck that has a 5.9L(360) in it, started to idle rough. Found out that it was the heads that Dodge puts on these motors. Flame hardened on the combustion chambers, one exhaust valve had burnt through the seat, which is not replaceable. 237,000 miles on this motor and the push rods, lifters, cam, rocker arms looked excellent. Previously, at around 198,000 miles, I had removed the pan to check and clean after I discovered a leak in the timing cover right behind the water pump( oil/ water in pan) and removed one main and one rod bearing. To my delight, both looked in great shape and checked out fine. Thanks to one quart of LUCAS oil additive with every oil change (5000 miles). I also use the fuel injection cleaner to o. Will be trying some other Lucas products very soon. Thanks so much for keeping my vehicles in clean running condition." -Mark Drummond
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