Extreme Duty Marine SAE 20W-50 Engine Oil

Lucas Oil Products, Inc.

Extreme Duty Marine Engine Oil SAE 20W-50

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 severe 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 engine
  • Safely blends and is compatible with synthetic and non-synthetic oils
  • Petroleum and semi-synthetic SAE 20W-50 grades
  • Contains effective anti-wear agents, detergents, Lucas unique additive chemistry and friction modifiers (molybdenum) to provide the ultimate performance
  • Proven performance in marine applications
  • Compatible with methanol and all racing fuels
  • Zinc and phosphorous chemistry provides excellent boundary lubrication at start up (contains 0.31% zinc)
  • Conventional grade is factory fill for ILMOR high performance engines


  • #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
zinc Zinc Values

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We are so glad we tried your products.

Dear Lucas Oil Products.
When people read about the claims of products, they are skeptical.  We are so glad we tried your products.  
First- Your Fuel Injector Cleaner We Drive a 2000 Chevy Blazer.  When the motor starts surging at idle all my husband has to do is add the recommended amount and the problem is gone.  Plus we get better gas milage.  
Next- Your Engine Oil Stop Leak The hoses for the remote oil filter on the Blazer were leaking.  We debated whether we wanted to replace them.  My husband added a quart of the Stop Leak at an oil change and the leaking stopped.  Now he adds one at every oil change.
And Now- Your Transmission Fix We have a 1971 Corvette.  The trans was slipping.  Again, all we had to do was add some and the problem was gone. 
One Last Thing- Our nine year old granddaughter races a Jr. Champ Kart.  IF you ever came out with anything to increase horse power let us know.
All of your products are really really outstanding and we promote their use with the people we know.
We also talk to the guys at Napa, where we buy them, to pass on the great performance of your products.
Thanks so much,

Rich & Connie 

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