Customer Ratings & Reviews

I have a dodge ram 6.7 cummins 2500 4X4 Truck that pulls a 14k Fifth wheel. I noticed my rear end was chattering when turning on long trips. Acted just like it needed slip additive. All the info I could find said no additive. Dodge dealer wanted to do diff work...NOT 80k miles and no noise.. I decided to go up on wt. to 110 sever gear. All GOOD! Perfect! I tell everyone I meet to trash the mopar fluid if your working your truck.

I have found that all of the Severe Gear Full Synthetic Gear Lube to be the highest quality! I wouldn't use anything else.

Replaced the gear oil in my 07 f150 with amsoil and couldn't be happier. Pretty sure I even get a mpg or 2 better gas millage as well. Transmission also tends to downshift less going up hills. Next up I will be switching out the trans oil with amsoil as well.

I use this product and I highly recommend it.

I have used many different synthetics over the years. I Choose AMSOIL based of independent testing and from personal experience of seeing how well it works.

I have this in 2 different vehicles. Its grate stuff.

I ran this oil in my old 2006 sillverado's differentials for over 200k miles and ever had to repairthem for any reason. I recently put this in both the front and rear end of my 2014 Silverado. The factory oil in the rear end was much thinner and my rear differential was noisy. This oil cured that instantly and now its nice and quiet. Despite this oil being thicker than factory i have not seen any negative difference in fuel economy.

Stopped all noises when shifting from forward to reverse Also added sliplock

Great product, no friction modifier needed, differentials really quiet, piece of mind when towing!

I've changed both front and rear differential with this product very good

I have been using this product for years in my 1996 Heritage Softail Classic. I have reviewed the technical comparison reviews and selected Amsoil over your competitors.

I've been a long time user of Mobil 1 recently switched to amsoil after much research a far superior lubricant.

Drained front differential oil after 100,000 miles still as clean as the day I put it in!

Used for a a 2015 Ram 1500. The old oil came out at 77 k miles. It was foaming extremely bad (air bubbles in oil). I replaced with severe gear and Amsoil's limited slip fluid. I noticed smoother driving characteristics with the severe gear. The truck rolls better. I also noticed a 1 mpg increase in fuel economy.

Great

I have 2013 freightliner Cascadia. Was changing oil in differentials. So far, best product market has to offer. Differentials runs much quieter, lower temperatures. And over all feels so smooth.

Used this in my 18 Ram 2500. Reading some forums, some people had to use limited slip additive in their rear diff because of some chatter even though they have a torsen style limited slip with no clutches. I have not had any of this chatter with this oil.

I use nothing but Amsoil in all our vehicles and equipment.

Great synthetic gear oil.

After 100,000 miles on my 2008 Tacoma I switched to Amsoil and saw noticeable smooth shifts out of my manual transmissions especially in colder weather.