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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James uses Lucas Power Steering Stop Leak

I used to own a 1992 Dodge Grand Caravan, which was used when I bought it in 2005 and had about 115, 000 miles on it. I changed the oil in it and ran the Lucas Heavy Duty Oil Stabilizer in it every time I did an oil change. I also used every fuel up Lucas Fuel Treatment. They both worked well because up till the van was totaled in an accident, I had it over 220,000 miles or so. But the best of your products and the two I always recommend to everyone is the Lucas Power Steering Stop Leak, Lucas Transmission Fix. Reason being for both. The Lucas Transmission Fix was used when I changed my transmission filter, and fluid. Little did I know that in Dodge Transmission that I should have used the ATF +3 not regular ATF. The mechanic I worked for told me to get that out of the transmission instantly and replace it with the correct fluid, I did so and ran another bottle of Lucas Transmission Fix in it. I didn't have any transmission problems at all and it shifted fine up till the accident. Now for the Lucas Power Steering Stop Leak. My rack started to leak and I was sick of buying bottles of regular fluid. I didn't have the money to replace the rack, so knowing about Lucas products, I looked for something to help me out. I came across the Lucas Power Steering Stop Leak. I must say, no it didn't stop the leak, my rack was way far gone for any product short of a hole filler stopping the leaks. But what it did, even with the whole power steering reservoir empty, it kept that vans steering perfect, never lost any power with it and not a bit of noise, and trust me, without the Lucas Power Steering Stop Leak in it, it made noise like crazy. I can say, that the Lucas Power Steering Stop Leak even with an empty res can keep your power steering system working well, I know because it worked great for me. I tell anyone who is changing the fluids in their car to add in Lucas products, and if they have power steering noises or leaks to get the Lucas Power Steering Stop Leak. Great product. 100% satisfied repeat customer.


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