Fellow mu-X owner here! If you're thinking about upgrading from the standard Isuzu Genuine Motor Oil 10W-30, check out the ZIC X7 Diesel 10W-30 Fully synthetic. I used Amsoil Turbo Truck 5w40 too (10k km interval) but it's expensive for my Garage queen mux haha. Mobil Delvac1 5W-40 is good as well.
Reviews of AMSOIL parts For Business
USA
I have Signature in my 25. Smoothed out the engine noises quite a bit.
Engine noise is a little, well noisy, mine is less rumbly/vibrationy after I changed my oil and used Amsoil Hybrid oil. I can’t generally feel anything when the engine kicks on now, before I could definitely feel it every time it kicked on.
I switched oil to AMSOIL signature series synthetic, from everything I read, it out performs other oils, used to use Mobil 1
Well I see you went stp which is not as good as OEM. I run amsoil filters and have no issue, I prefer amsoil to OEM because amsoil have tested at a 99 percent particles are filtered out.
Since I was ordering oil from Amsoil I went that route and the filter was amazingly robust.
My 2016 GT350R has almost 25K miles and has never needed oil between changes. I use Amsoil every 5000 miles, sooner depending on track abuse.
Amsoil engine flush. Then some Amsoil 0w-40 full synthetic and oil filter change. Sounds like lifter tick.
My biggest regret, not swapping out the shitty 0w-20 factory filled oil for some 5w-30 Amsoil, Motul, or Pennzoil Ultra platinum the moment I took it home. Don\u2019t wait till 1k miles.
Get a catch can but that mobile 1 oil you are using is for shit . Amsoil is best for mustangs and the best for that matter period it\u2019s cost but you can run it 25k
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Owner reviews of AMSOIL products
The AMSOIL brand is registered in USA. Official website: https://www.amsoil.com .
In March 2026, PartReview recorded 390 reviews across 8 parts by AMSOIL. Average rating — 3.9 out of 5.
AMSOIL is in the PartReview manufacturers ranking, currently at position 91. Over the last 30 days it dropped by 45 points.
Popular AMSOIL parts
The most popular AMSOIL products on PartReview:
- Engine oil AMSOIL - 328 reviews. PR Score — 93, average rating — 4.5.
- Oil filter AMSOIL - 31 review. PR Score — 94, average rating — 4.5.
- Gear oil AMSOIL - 13 reviews. PR Score — 95, average rating — 4.6.
- CVT fluid AMSOIL - 10 reviews. PR Score — 100, average rating — 5.
- Engine flush AMSOIL - 3 reviews. PR Score — not available yet, average rating — 4.
Most owner reviews about AMSOIL parts are collected on these pages.
Top-rated AMSOIL parts
AMSOIL achieved top positions in these PartReview part rankings:
- Best gear oil — ranked 2 among 3 manufacturers. Received 183 votes.
- Best engine oil — ranked 6 among 32 manufacturers. Received 12429 votes.
- Best oil filter — ranked 7 among 24 manufacturers. Received 4220 votes.
Comparisons of AMSOIL parts
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