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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Matt Druyor uses Lucas Heavy Duty Oil Stabilizer in 2001 Oldsmobile Intrigue

I own a 2001 Olds Intrigue which currently has 118,000 miles on it. I purchased it in 2003 with 25,000 miles on it, no problems. Obviously, this car has been DRIVEN. Michigan's climate is known for excessive wear on engines and with the car being driven to Florida and back 5 times, I can say the engine is broken in. A friend reccommended your fuel treatment when I was having injector issues and in just two tanks of gas, the hesitation stopped. I then started to use 1 qt of the oil stabilizer in every oil change. Being the car takes 6.5 qts of oil, someitmes I use 30/70 Lucas/Oil and I must say that your product is amazing! The car starts on the first try cold or warm, does not burn ANY oil and still feels like it has all 215 horses. When I put synthetic oil in, usualy every 3rd or 4th oil change, I use the synthetic stabilizer- even though the 3.5 is known for "using" oil, I still have a full crankcase at every oil change. I will put your products in every vehicle I will own in the future.

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