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Lucas Oil Synthetic 75W140 Gear Oil

AmericanMuscle no longer carries the Lucas Oil Synthetic 75W140 Gear Oil. Please check out 1999-2004 Mustang Maintenance & Tools for an updated selection.

Features & Details

  • Full Synthetic
  • Protects Against Wear
  • Designed for Heavy Duty or High Performance Applications
  • 75w140 Weight
  • 8.8" Ford Rear Ends Require 3 Quarts
  • For 1979-2017 Mustangs
Increase Performance. Increase the performance of your Mustang's drivetrain with Lucas SAE 75W-140 Synthetic Gear Oil. This fully synthetic oil is a non-foaming, super slick, long lasting lubricant designed especially for heavy duty or high performance applications where other gear lubricants just can't compete. Great for new gears.

Superior Protection. Lucas SAE 75W-140 Synthetic Gear Oil contains a special additive package that helps cushion gears and resists "squeezing out" under extreme pressure situations where other gear lubricants fail. Lucas Synthetic Gear Oil is specially formulated to stand up to high temperatures without losing its lubricity to protect against wear.

Application. Lucas Synthetic 75W140 weight gear oil is recommended for use in 1979 to 2017 Mustangs, including LX, V6, GT, Bullitt, Mach 1, SVT Cobra, and Shelby GT500 models. Three (3) quarts of gear oil are required to fill a 8.8" Ford rear end. Sold individually.

MPN# 10121

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) one quart bottle
Installation Info
Tech Specs

      Questions & Answers (1)

      1 Top Rated Question

      Do I need to add a friction modifier to this gear oil or will this work by itself?

      • I bought a gallon of this from another website (AM doesn't sell it in a gallon size). It says on the side of the bottle that it is good to use in limited slip diffs. I have it in mine and no problems. It takes right around three quarts.

      Helpful (0)
      Post Your Question

        Customer Reviews (6) Write a Review

        Overall Rating 5

        out of 5 stars

        Installation Time:Less than 1 Hour

        • Performance Gain 4.833333 4.8
        • Fit 5 5

        • 5/5

          July 04, 2017

          Good oil

          Had to replace the rear end oil when I installed a Watts link. Been running it for about 6 weeks now and no complaints. Lucas seems like a good value for a high quality product.


          Year: 2012 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Less than 1 Hour

          February 08, 2016


          Great product as always .I have used Lucas oils on other projects and have been very pleased with them every time . Good work American Muscle for carrying the Lucas product . Try them , you wont be disapointed .


          Year: 2013 Submodel: GT HOMERVILLE, OH

          Helpful (6)

        • 5/5

          Installation Time: Less than 1 Hour

          June 11, 2015

          Simply put... Lucas is the Best!!!

          A long long time ago I had a 92 Pontiac Bonneville with 200,000 miles and a slipping transmission. I took it to like 10 transmission shops in the area and of course they all said it needed to be rebuilt (obviously I was down on my luck or I would have been driving a Mustang) and I couldn't afford that. I remembered seeing Lucas transmission fix on the shelf at Walmart for like $12 so I thought what the heck... Put it in and then proceed to put another 50,000 slip free miles on it before the engine crapped out, and that is why I ALWAYS depend on Lucas Oil Products for my oiling needs. They are simply the BEST when it comes to oil and they have proven it time and time again.


          Year: 2003 Submodel: GT Benton, AR

          Helpful (5)

        • 5/5

          Installation Time: Less than 1 Hour

          May 29, 2015


          Another great Lucas product. I have been converting every fluid I can to Lucas products. Nothing I have tried prior compares to the performance of this great brand.


          Year: 2005 Submodel: V6 Lindley, NY

          Helpful (6)

        • 5/5

          Installation Time: Less than 1 Hour

          November 24, 2013

          Great oil

          I had to swap rear end gears and when I drained this oil after about 20,000 miles, it still looked brand new! Great oil!


          Year: 2010 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Less than 1 Hour

          December 22, 2012

          great stuff

          Use to have rear end noise until I installed lucas gear oil in my 02 GT. Great stuff and I would recommend this oil to anyone.


          Year: 2002 Submodel: GT San Diego, CA, USA

          Helpful (5)

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