Customer Ratings & Reviews

Used at 40,000 MI and now at 90,000 MI in front and rear differentials. Mostly City and highway driving not really towing but they run great

Use in my motorcycle and at every change no metallic comes out and fluid looks almost as clean as new at every 5k service worth every penny and service here is awesome

I don't usually like what the manufacture suggests because they want you back in there to replace worn items. I like using this product with the slip lock additive and it keeps my differentials working nicely.

It seems to be a fine product. I like the package. It’s easy to use in tight spots. It appears to be good quality.

It seems to be a fine product. I like the package. It’s easy to use in tight spots. Very clear looking oil.

This is great packaging ,saved a great amount of time filling rear differential. Oh and the oil is as usual the best to use !!!!!!

Needed gear oil for a rototiller. 75w-140 was specified by the OEM. Amsoil Severe Gear Oil is a perfect fit and the easy pack made adding gear oil to the transfer case a snap.

Every car and or truck I buy I immediately change all of the fluids on it. No mater how many miles are on them I start with a clean service plate. Rear differential front differential transfer case everything gets amsoil including my engines.

Anything made by these folks is top notch.

Did a full ams oil fluid change wow what a difference.

Should’ve done this change as soon as I got my vehicle. Now at 250,000 mile on my 2003 Silverado,it is still a big improvement.

Bought Severe gear oil 75w-140 for ptu fluid change. The car feels smoother after the change. Please give a big raise to whoever design/package the oil in squeezable container. It helps a lot when filling the unit in tight space without need of hand fluid pump!! Wish there are more local retailers that carry the product so I do not have to deal with shipping and waiting.

Looks good, will see how it looks next service. Shipping was quick!!!

Had a chatter in rear end, changed the gear oil with severe gear along with slip lock . Chatter is totally gone. Truck has 270000 miles on it and now runs smooth.

This has been in my race car for several years and the gears show no signs of wear.

The product is worth it just for how easy it is to fill up your differential and not to mention it's the best differential oil on the market hands down. My actuator in my k1500 front differential engages faster I believe now for 4x4.

Changed the differentials and transfer case. Noticeable improvement in quickness and less noise. In addition, "felt" like it was a smoother transfer. Anecdotal at best for the moment. We'll see at the next interval what condition the oil is in. Due to that inspection, I don't think asking for an evaluation before a service interval is quite fair or accurate. That being stated, I am confident it will perform well.

Great product. Used on front and rear differentials for Ford and GM cars/trucks. Easy Packs are the way to go.

Easy to use bottle, Amsoil quality!

First time using but feels heavy. Can’t wait for change to see how it holds up