vs
Engine oil IDEMITSU or Pentosin
I think Idemitsu is the better option if you have access to it. Mostly because it was developed for the rotary engine.
Pros: developed for rotary engine
Cons: hard to find
Idemitsu to both, because it’s designed and tested on rotaries.
Pros: designed for rotaries
Pentosin is fine, Mobil 1 is fine, Castrol, whatever. I put Mobil 1 in my racecar but castrol in my daily because it burns oil and I want a heavier weight that I can't find Mobil 1 in. Pentosin or LiquiMoly are good, but don't put too much thought into it.
Pros: Pentosin is fine
Vehicle:
BMW
I use idemitsu rotary 20w50
I stick to Idemitsu. I have a Sohn adapter fitted, so it's 10-30 Idemitsu in the engine, twice a year and Idemitsu Premix in the Sohn adapter and in the fuel tank.
Pros: idemitsu in the engine
I use pentosin. Made for vws. Change it every 10k. Good quality filter and you'll be good
Pros: good quality filter
Mileage: 10000 km
I don’t use the Mazda-branded version, but Idemitsu is my go-to oil in all of our Mazdas
Pros: go-to oil
Vehicle:
Mazda
I use Pentosin in the e46, which I believe is BMW OEM supplier.
Vehicle:
BMW
Idemitsu is the only premix and engine oil I’ll use ... you can order it for a good price from TREx performance out of NJ and he will ship
Pros: good price, easy to order
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.
Pros: trace metals normal range
Vehicle:
Mazda 3
Mileage: 12500 km
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