Mobil 1 102490 75W-140 Synthetic Gear Lube - 1 Quart (Pack of 2)

Diff. oil does need to be changed, old thickened diff oil/grease will use more fuel to turn the thousands of times it spins for each mile driven. Changing your old diff. grease helps to dump all the old metal grindings out, and putting in fresh easier turning synthetic diff. oil makes it all work better and cooler too. Differentials either front or rear driven are very expensive, help them last a lifetime, change the grease.Use synthetic grease, you will get better gas mileage, and it lubes gears better too.

Highly recommended product but pricy!

as expected 👌

Good reputation and nice product. I have had to be in my differentials for different reasons and impressed by how clean the oil remains. The oil remains clear and clean with no burnt smell. Lastly, the bottle design allows east filling even in difficult positions. Would buy again with confidence.

Would be better as a squeeze bag.