Extreme Duty Marine ATF

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Extreme Duty Marine ATF

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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
  • High performance, high torque, non-electronic shift transmissions. Ensures firm shifting which improves performance and prolongs clutch-life
  • 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


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


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

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Laurence Mardon uses Lucas Fuel Treatment in Mazda RX-7 -- 1st generation w 2nd gen. turbo swap

I run a beautiful first generation Mazda RX-7 with a 2nd generation turbo engine swapped in. The first gen RX-7 (and the third) was a pure driver's car: great handling and -- with the turbo -- very nice performance.

I've made a number of modifications and tried different doo-dads, but I'm just writing to say that one of the most effective is your Upper Cylinder Lubricant with Injector Cleaners.

I've used it for the last 5 or 6 fill-ups and I'm very impressed: my engine is running much smoother, with a beautiful note to it when I pull away from the traffic behind me.

Great work, Lucas, whoever you are!


Laurence Mardon

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