Extreme Duty Marine SAE 20W-50 Engine Oil

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Extreme Duty Marine SAE 20W-50 Engine Oil

Lucas Extreme Duty Marine SAE 20W-50 Engine Oil is designed for use in high performance boats requiring the ultimate protection.

Lucas Extreme Duty Marine SAE 20W-50 Engine Oil is manufactured with the highest quality paraffinic base oils and is fortified with an exclusive additive package containing high levels of Zinc, Moly and Phosphorus that provides a tougher, thicker additive film for maximum protection even under the most sever conditions. It lowers oil temperatures, extends oil life and minimizes metal fatigue.

Lucas Marine SAE 20W-50 improves the film strength between the cylinder  wall and piston rings and slows oil burning while improving pressure levels in worn engines. It has good cold temperature properties and stands up to high operating temperatures. This product is compatible with methanol and all racing fuels.

Key Benefits

  • Excellent for use with supercharged, turbo charged or nitrous oxide high performance engines
  • Protects against rust and moisture during long periods of storage
  • Safely blends and is compatible with synthetic and non-synthetic oils
  • Dropping point 540 lbs
  • Provides rust and corrosion protection in both fresh water and salt water environments
  • Effective Water Resistance
  • Long Lasting
  • Resist Extreme Pressure
  • Extreme Friction Reducer

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* Size:


  • #10653 - 1 Quart (Case of 6) - 13 lbs
  • #10810 - 5 Quart (Case of 3) - 31 lbs
  • #10665 - 5 Gallon Pail (1 Pail) - 40 lbs
  • #10666 - 55 Gallon Drum (1 Drum) - 440 lbs


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

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Mack Johnson uses Lucas Oil ATF in a Ford Mustang

I just wanted to send you a note to let you know how much I appreciate the support from Lucas Oil and Dunn Benson Ford this year. Without it, it just wouldn’t have been possible to have the kind of year we had.

With your help, we were able to finish up the year with two wins, two more runner-ups and numerous late-round finishes. We also ended up with a third place finish in the points standings at Dunn Benson Dragstrip. Naturally, I would have loved to finish higher but considering I started the season just hoping for a top 10 finish, it’s safe to say I’m very happy with how the year went for us. We were also able to qualify for the IHRA Division 1 Bracket Finals at Virginia Motorsports Park. Driver error knocked us out in the second round. We did win three out of four rounds we were in that weekend though, so not a bad weekend overall. Just being able to attend the races was a dream come true, and again, you helped make it possible.

I also want to say that all the Lucas Oil Products in our car performed absolutely flawlessly all year long. We put about 400 runs on the car this year and the only failure we had (other than driver failure) was a leaking pump gasket in the transmission, definitely not an oil related problem. I think that switching to the Lucas Transmission fluid was the single most important thing we did last year to make the car more consistent. Before the switch, our first run off the trailer would many times be several hundredths slower than successive runs. However, this year it was not unusual at all to have the first and second time trial runs be less than 1 one-hundredth of a second apart, and in two different lanes at that. I can only attribute this to the more stable viscosity of the transmission fluid at varying temperatures.

On the night of one of our wins, we made a total of 10 runs in one night including time trials and even making runs as little as 10 minutes apart, the car stayed very consistent. Please thank the good people at Lucas Oil for making such good products.

Mack Johnson
MJS Racing Ford Mustang

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