vs
Engine oil IDEMITSU or OEM BMW
Idemitsu to both, because it’s designed and tested on rotaries.
Pros: designed for rotaries
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
BMW used to recommend you changing oil basically every time you blink, back when consumers paid for 100% of all maintenance. But in order to be more competitive, they began offering 3 year included free maintenance on all new vehicles.
Vehicle:
BMW
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
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
In terms of oiling, get a sohn adapter so your apex seals aren't being lubricated with crankcase oil, and instead are injected with rotary-specific oil, like idemitsu.
Pros: rotary-specific oil
Subaru OEM oil is Idemitsu 0W-20. I currently use Idemitsu Zepro\* 0W-20, a high-moly formulation from the same manufacturer.
Pros: high-moly formulation
Vehicle:
Subaru
That's the wrong oil. You want the Idemitsu eco gold medalist advanced moly 0w-20, which is basically the same as Mazda oil(Idemitsu makes the mazda oil).
Pros: basically the same
Cons: wrong oil
Vehicle:
Mazda 3
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