Synthetic 50 WT Trans Oil

Synthetic 50 WT Transmission Oil


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Lucas Synthetic 50 WT Transmission Oil is designed especially for heavy duty truck transmissions but can be used in many other applications.

Common gear oils are mostly base stocks with little more than an addition of sulfur and phosphorus as a total anti-wear package. We at Lucas Oil Products consider this inadequate. Most heavy duty truck transmission manufacturers now consider sulfur and phosphorus to be potentially corrosive to copper and brass and consequently recommend against common gear oils for this reason. The other 50 WT we have tested, synthetic or otherwise, are pure base stock, we consider this also inadequate.

Lucas Synthetic 50 WT contains an exclusive additive concentrate derived from synthetic oil that ensures lower operating temperatures and better lubrication, especially to upper bearings and gears. This is a long lasting fluid that is far superior to conventional synthetic fluids and contains nothing that could be harmful.

Meets or exceeds API MT-1, Eaton Transmission Div., 164 rev 7, Mack Truck TO-A Plus, International Truck TMS 6816 and other applications requiring non-EP Lubricants.

Key Benefits

  • Long lasting fluid
  • Ensures lower operating temperatures and better lubrication
  • Contains an exclusive additive concentrate


  • #10146 - 1 Gallon (Case of 4) - 33 lbs
  • #10147 - 5 Gallon Pail (1 Pail) - 40 lbs
  • #10149 - 55 Gallon Drum (1 Drum) - 440 lbs
  • #10561 - Per Gallon Tote (1 Tote)


Product Spec Sheet Technical Data Sheet
Safety Data Sheet Safety Data Sheet

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Product Videos - Synthetic 50WT Transmission Oil

  • Lucas Synthetic 50 WT Transmission Oil

Chris Conner uses Lucas Transmission Fix for Ford F350 Diesel


My name is Chris Conner and I live in Fairchance, Pa. We travel to East Bay Raceway Park in Florida every February for the Lucas Oil sponosred dirt late model speed week. On the way there my F350 diesel 4-door dually with a newly replaced fomoco automatic transmission was pushing out transmission fluid. It seemed to be really bad on hard pulls or high speeds. When we first noticed oil all over the front of the trailer it had lost almost four quarts. We replaced the fluid and drove with caution the rest of the way.

After talking to some of the other racers there, they turned me on to the Lucas Transmission fluid, thinking this would just get me farther up the road and prolong the life of the transmission a few more miles. I was skeptical to say the least.

Over 1000 miles from home with a truck, trailer and a lot of expensive items all depending on that 24 ounce bottle to keep us from sitting on along Interstate 95 or in the middle of the night along Route 77 on one of those big mountains broke down.

Well, almost 17 hours of driving we made it home without a problem. After unhooking from the trailer and pulling the Ford into the shop, I checked the transmission fluid. To my surprise it was still right where it was when we left Florida. It was full, no oil was sprayed on the trailer or even on the back bumper of the truck,

I have to tell all my buddies about this Lucas stuff. It is amazing to say the least. Thank you for making a product that works very well and is priced affordably.

Thanks again,

Chris Conner
"The Breakneck Flyer"

Fairchance, PA

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