Amsoil severe gear lasted until ~3200 km, but it started again, but much slower progression.
Pros: lasted until 3200 km
Cons: issue started again
Mileage: 3200 km
Reviews of AMSOIL gear oil
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TBH, I recommend OEM fluid for the trans for this reason. It's too much of a minefield with hybrid fluids. I used to recommend Amsoil (I use it) but they no longer have the gear oil I use.
Pros: recommends Amsoil gear oil
Cons: no longer available
Amsoil makes a 75w-85 severe gear lube but I've always used the same in 75w-90 with no issues.
Pros: no issues
Amsoil Severe Gear, it's the best in the business
Pros: best in business
Vehicle:
Mazda
I put Amsoil Severe Gear 75-90 in both just last month.
I have a 22 6MT. I changed my driveline fluids myself at 30k. Super easy. I used Amsoil severe gear 75w90. It’s full synthetic.
Pros: super easy, full synthetic
Mileage: 30000 km
Amsoil. I’m not a fan of their engine oil but their transmission and gear oil is the best I’ve used so far.
Pros: best gear oil
I use Amsoil on my tundra. Except for the engine oil, i use mobil just because I changed my oil every 3000 miles, and i dont tow a lot, so I'm not reving my tundra as much . It is extremely expensive. I think I spend around 400.00 for the transmission,rear diff,transfer case, etc....But I did a lot of research on them, and they are worth the money.
Pros: worth the money
Cons: extremely expensive
Vehicle:
Toyota Tundra
Mileage: 3000 km
I just did mine today. Used VW haldex fluid for the AWD haldex, and Amsoil SevereGear 75W90 in both the front and rear bevel boxes.
Pros: used quality fluids
Vehicle:
Volkswagen Tiguan
I changed mine initially at 30k and refilled with Amsoil severe gear. Changed it again at 90k and wish I didn’t… the fluid still looked brand new.
Pros: fluid looked brand new
Cons: unnecessary fluid change
Mileage: 30000 km
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What we know about AMSOIL gear oil
The brand is registered in USA. Official website: https://www.amsoil.com.
In March 2026, PartReview users have a positive opinion of AMSOIL gear oil.
PR Score — 95 out of 100, based on 13 reviews and 40 votes. 12 positive reviews, 1 neutral review, 0 negative reviews. Average rating — 4.6 (out of 5). Vote balance: 38 up, 2 down.
In the ranking of the best gear oil this part is at position 2, behind RED LINE , but ahead of MOTUL and VALVOLINE.
Users also evaluated the qualities of AMSOIL gear oil:
- Noise - howl or rumble from the diff area is easy to hear - rated positively. 5 points out of 5.
- Smell - strong sulfur-like odor after a drive can indicate leaks - rated positively. 5 points out of 5.
- Leaks - wet gear oil at the housing or on the driveway is obvious - rated positively. 5 points out of 5.
Gear oil AMSOIL in car-specific ratings
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Gear oil AMSOIL in comparisons
There are 2 comparisons of AMSOIL gear oil with other manufacturers on PartReview.
In particular, see which gear oil are better: MOTUL or AMSOIL, AMSOIL or RED LINE .