Synthetic SAE 75W-90 M8 Marine Gear Oil

Lucas Oil Products, Inc.

Marine Gear Oil Synthetic SAE 75W-90 M8

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
  • #10818 - 55 Gallon Drum - 440 lbs


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

get adobe reader

Peter Trahanas from Melbourne, Australia

Firstly let me say that you can file this under “hard to believe but true” My background is considered highly technical and engineering in the Auto field for way to long and it has been a firm belief of mine that additives are of very little value to a well designed lubricant. I have a friend who came to me with a very sick TH700 (GM Trans) which would only operate for a few minutes when cold and then completely give up. The vehicle and transmission had done about 150,000 miles and was always loaded up with tools etc. I also suspect it had never been serviced. He asked me what could be done as the vehicle was “dead” and he could not afford to replace the transmission, I can't remember how it was suggested but the thought of additives was discussed. I was not in favor however the only loss would be the cost of the additives if it did not work. We limped the sorry mess of a car to the auto parts store and added three bottles of the transmission fix which overfilled it a little (it was low to start with). With tongue in cheek I started the car and waited for it to warm and circulate the fluid. To my surprise the car drove away ! To add to this small miracle the car kept driving for around two more years and around 30,000 miles until it was decided to update the car. It did not die, it was retired !! The car was driven very gently but was also loaded etc!! My thinking has changed. I have also used the power steering additive on LS engines (low miles) and noticed an improvement in the feel of the steering. Still very careful about believing claims by additive companies however you guys are on my “trust list”. To your Lubricant chemists/engineers. Well done guys.
Share Your Lucas Oil Story