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 sever 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) - 12 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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Tom Mayersky uses Lucas Heavy Duty Oil Stabilizer for Ford Ranger

Dear Sir,

I got introduced to your product at the Hooters ProCup race as I help in the pits. Plus, I like the Lucas Oil display at our local Parts America store in Lancaster, PA.

I had a 1989 Ford Ranger that had over 100,000 miles on it. I used Lucas Oil faithfully in it. The truck ran great and the miles kept coming. I know have a 2001 Ford Ranger and every 3,000 miles I have Lucas Oil Stabilizer added to the new oil. I believe in you product. The cost at my store is $6.95 and its worth it.

I hope to put over 148,000 miles on this Ranger. With running kids to swim practice, and me coaching high school football and scouting appointments, I put over 15,000 miles a year on my truck. My truck has over 20,000 miles and its not quite a year old.

I have confidence in my truck with Lucas Oil everyday when I leave for school (I am a PE and health teacher for grades 5 and 6). Players that drive to school with the late model cars and trucks I tell them about Lucas Oil.

A Loyal Customer

Coach Tom Mayersky

Oxford, PA

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