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Originally Posted by RowTarEEE
Any reputable sources or anyone with bad experience? I ran RP for awhile in my RX-8 without a problem (yes we can use synthetic). Then I switched to Mobil 1 and my engine seals gave out at 90k miles. I'm not sure if it's the oil or just the common RX-8 curse.
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I've always heard mixed things about RP oil. I personally plan on going with the Subaru oil for my FR-S. I assume other popular oils aren't tailored for boxer engines, and in that case, Subaru oil should be the best.
I have an old streetported N/A FC and have only used Idemitsu oil in it (premix and engine oil). Idemitsu Rotary Engine oil is just that. Oil tailored to rotary engines ;p. Additionally, rotary engines typically need a rebuild much sooner than piston engines, so it's not surprising your seals gave out at 90k.
At the end of the day, I doubt it matters which oil you plan on using if all one does is street driving.