The project farm video convinced me to use Pennzoil Ultra Platinum. It’s about 98% of the performance of Amsoil for much less money.
Owner reviews for engine oil
From what I've read online, Pennzoil Platinum 5w30 is a solid option that you can find at most retailers.
I'm one of those "risk takers" that went with Motul 5w40 X-Cess. The oil has been fine as far as I can tell but I'm no expert.
The oil was Idemitsu Synthetic 0W-20 with 12.5k miles on it. Once again, trace metals and flashpoint were within normal range. I also ordered a TBN to measure the amount of additive left and that showed there was still plenty of active additive remaining.
I tried Motul 7100 oil, man that thing is awesome, but expensive. Lasted be 1800miles before change
Motul every 10k for over 200k miles @486whp. Oil tests every other change. Now I do 5k or every 3 track events/races.
I use Valvoline XLIII and it works great and not terribly expensive.
Using Rotella T6 synthetic 5W40 rated for turbo diesel. Lots of VW mkiv owners use it. Cheap from Walmart. Have been using Liqui Moly 5W40 as well but supplier is all out.
Mobil 5w-40 has absolutely been quieter for me than the Castrol equivalent.
Try using 5w30 castrol from walmart black container with green writing, since switched been driving 2.7k with in 2-3 month oil on the same level
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