Extreme Duty Marine Semi Synthetic 20W-50 Engine Oil

Lucas Oil Products, Inc.

Extreme Duty Marine Engine Oil Semi Synthetic SAE 20W-50

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

Lucas Extreme Duty Marine Semi Synthetic 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 severe conditions. It lowers oil temperatures, extends oil life and minimizes metal fatigue.

Lucas Marine Semi Synthetic 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


  • #10654 - 1 Quart (Case of 6) - 13 lbs
  • #10811 - 5 Quart (Case of 3) - 31 lbs
  • #10667 - 5 Gallon Pail (1 Pail) - 40 lbs
  • #10668 - 55 Gallon Drum (1 Drum) - 440 lbs


Product Spec Sheet Technical Data Sheet
Safety Data Sheet Safety Data Sheet
zinc Zinc Values

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Jake L Has a Camaro and a Ranger and they both run with more power with Lucas

I own a 1997 Camaro with a 3800 series 2 v6 and a 2000 ford ranger with a 3.0 v6...my Camaro has 140,700 miles on it and my ranger has 131,000 miles on it .....i use Lucas Synthetic oil stabilizer and fuel treatments in both of my vehicles....your products are amazing!!!!!! i noticed a difference in both oil pressure and engine smoothness and running like new engines....!!!!!

The oil pressure in my Camaro always had  a  fluctuation between 20- 40 psi at idle and the needle would move.....always ran mobile one synthetic in the Camaro, now that i added the synthetic stabilizer it now is at 60 psi at idle and when driving, the needle never moves.....and more power!!!!!!lots more power!!!! as for my ranger...my truck always had a slight start up knock like a dry start since i bought it... now it has been eliminated!!!!and runs like a new truck ......i love your products and forever a fan!!!!!!!

I hope to go a half million miles on my Camaro.....or more........with Lucas Products, i know it will be possible!!!!!!

Thanks Lucas!!!!!!!


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