Extreme Duty Marine ATF

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Extreme Duty Marine ATF

Lucas Extreme Duty Marine ATF is a blend of specific synthetic base oils and a special Lucas additive package designed to create a high friction fluid that allows shifting clutches in the transmission to lock up and engage quickly. A faster shift means less clutch slippage, therefore, less heat and wear in the transmission.

Fortified with special synthetic additives that coat moving parts to protect against rust and moisture during storage.

Key Benefits

  • Pure Synthetic
  • Designed for use in off shore boat racing transmissions
  • An easy flowing fluid with superior heat transfer capabilities
  • Expect excellent performance cold or hot
  • Contains special anti-foaming agents
  • A stable long life fluid - perfect for irregular maintenance
  • Safely blends with other synthetic & non-synthetic fluids

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* Size:


  • #10651 - 1 Quart (Case of 6) - 13 lbs


Product Spec Sheet Technical Data Sheet - English
Safety Data Sheet Safety Data Sheet - English
Safety Data Sheet Safety Data Sheet - French
Safety Data Sheet Safety Data Sheet - German
Safety Data Sheet Safety Data Sheet - Netherlands (Dutch)
Safety Data Sheet Safety Data Sheet - Portuguese
Safety Data Sheet Safety Data Sheet - Spanish
Safety Data Sheet Safety Data Sheet - Swedish

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Jess James uses Lucas Heavy Duty Oil Stabilizer for 1977 Ford F350

Dear Mr. Lucas

I have used Lucas Oil Products for about 9 or 10 years with 100% satisfaction. My work truck is a 1977 Ford F-350 pick-up working on its third engine which I installed roughly two years ago. It is a high pro motor, 60 over pistons, heads milled 60, roller cam & lifters, ported, relieved and balanced. After a break-in period of 500 miles, I put the most reliable oil treatment I know of in this motor: Lucas Oil Stabilizer and this is my story.

I was going to work one morning earlier this year when the crankcase cooler oil line broke and within two minutes every drop of oil was pumped out of this new 460 mil onto the road. The gauge showed "0" oil pressure. Caught in traffic, I had to wait to get to the shoulder of the raod. I then called a tow truck to bring me in. Back at home, I took the oil pan down to check the main and rod bearings. No damage was done to the crank or bearings. They were 'mic'-ed and reinstalled and then we took a compression test. Result? 195 PSI in all cylinders! Thank you for your product. It does what it says and more. I could have lost $3,200 if I had not used your oil stabilizer in this motor.

I also use your oil stabilizer in my 1978 Ford F-150 pick-up which has 210,000 original miles and a 351 Windsor engine, C-6 transmission. I religiously change the oil every 4,000 miles each truck and every 2,000 miles I change the Fram filter and add Lucas Oil Stabilizer to replace the oil in the crankcase coolers and oil filters. Recently, I used your fuel additive in the 351 Windsor and the compression has come up by 12 psi in each cylinder and runs like a sewing machine.

No one I tell this story to believes me, until they try your products themselves. Then they express their thanks to me for educating them about your products. Now it is my turn to say Thank You! It is my pleasure to use any product you make because it does work 100% and more.


Jess James

Hollywood, Florida

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