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
Reviews of IDEMITSU engine oil
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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
Idemitsu zepro eco medalist advanced moly 0w-20. Basically the same thing as Mazda's oil.
Pros: high moly oils
Vehicle:
Mazda 3
You don't need to add any more additives to modern day oils. You said you will be using Mazda 0W-20 oil? This is one of the best 0W-20 oils on the market. It is made by Idemitsu for Mazda. It has very high Viscosity Index of 221. Most 0W-20 oils are around 170. This means it is one of the lightest 0W-20 at start up. This is what you want in the winter.
Pros: high Viscosity Index
Vehicle:
Mazda
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