Customer Ratings & Reviews

The best oil made

I started using it in my 1977 Chevy 4 wheel drive thanks to a friend who showed it to me. I drained both axles and the 4 speed tranny and transfer case and replaced it with Amsoil.I put 15 40 motor oil in. When it got 20 below zero and colder my truck would start when a lot of others wouldn't. The gear oil I drained into a pan could be cut into cubes. A lot of guys could hardly shift there tranny. 330000 miles on my dodge with mag hi-tech differential covers and not one tiny piece of steel on the magnets.I can go about 8000 thousand miles before my Cummins uses a quart of oil.

Great replacement when I was servicing a 2105 Charger. Works well with the limited slip, locks up great.

It does what I expect from the best Nuff said.

Installed in my awd ptu on a 2012 Taurus sho. 75w140 is recommended but the severe gear 75w140 holds up well for my 30k mile change interval and I don't worry about it thickening. This ptu is in a very high heat zone near the catalytic converters and it beats up the lube, turning it to paste in about 50kmiles. Now with catless down pipes (40°f+ lower ptu temps) I don't need 75w140. The 75w110 severe gear is working great, and I notice less drive train drag than with the 75w140.

I love this gear oil best gear oil I've ever used

I run this in my 95 k1500 front and back diffs and my 05 2500hd duramax front and back diffs. Great stuff works very well I've never had an issue.im happy to know I have the best protection from the elements so it's peace of mind running this stuff.

This is a great gear oil . Can't go wrong with this product.

Replaced OEM front and rear differential fluids of a new 2017 AWD Subaru Outback, and refilled with this 75W-90 product at approximately 3000 miles. With OEM fluids, an infrequent driveline 'clunk' used to occur when making tight (e.g., U-) turns. This behavior has NOT occurred (in over 2500 miles) since after refilling with Amsoil's synthetic Severe Gear differential oil. For our vehicle, changing out the differential fluid shortly after 'breaking-in' the differentials seemed to be a good choice (judging by the drain plug magnet debris). I obviously can't comment about product longevity, but with the elimination of an infrequent driveline 'clunk', we're extremely pleased thus far!

Replaced diff fluid in rear of 13 f150 at 45000 Factory fluid was nasty and very dirty. Jury is out on this fluid but at 72000 now without issues....make sure you check to see if you have a limitex slip diff as you will need the additive.

Used for rear gear oil changed in 2005 Chevy Duramax. Works as described have used before and was pleased with Performace when towing boat, looking forward to the future performance of severe gear oil.

Replaced the factory fill with two quarts of severe gear.

upgraded to a better product

As with all other AMSOIL products that I use in everything I love it and recommend all their products to everyone who cares about their investments.

I replaced the 85w140 conventional in the 14-bolt full float rear axle in my '85 GMC with Severe Gear 75w110 and noticed the difference immediately! Gained at least 15 horsepower. Good stuff!

Working good. Truck pulls 15000lb camper 90% of the miles.

I've been using Amsoil for 6yrs now because the product gives my car and truck the most protection and life out of my vehicles , so buy choosing severe gear oil for my truck was the right choose , Thanks Amsoil.

Performs great.

this stuff rules my roost

I haven't been using amsoil for long, but I have been happy with everything I've purchased so far. Will continue to use amsoil fluids throughout our vehicles.