vs
Engine oil IDEMITSU or FUCHS
Been running Fuchs 5W40 lately, N52 with 130k kms
Vehicle:
BMW
Mileage: 130000 km
I use Fuchs Titan SuperSyn 5W-40 - widely considered to be the lowest-consumption oil for the M54 engine, and it's very cheap.
Mann filter.
Pros: lowest-consumption oil, very cheap
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
Fuchs Titan 5w30
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
I've posted my UOAs on TDIClub and BITOG. The factory fill was additive depleted at 5400 miles. The Fuchs 507.00 in the next fill was good for 7-7500 miles. It might have gone longer, but I changed it out in advance of a long trip. Bottom line is that preliminary evidence is that the 507 oils are inadequate for extended OCIs in the 3.0L motor.
Pros: good for 7-7500 miles
Cons: additive depleted at 5400
Mileage: 8694 km
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