Customer Ratings & Reviews

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.

I tow and the temps are low

I have run Amsoil for years. Its the only fluids that I trust in my truck

I use this in my from and rear axles on my Toyota 4x4 and my Arm's. Have used this stuff for many years and love it

I use this product in all my vehicles. Wouldnt trust anything else. You get what you pay for and pay for what you get. Great stuff!

Excellent product for differential protection