I would stick with the Subaru oil. Tune or not.
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i was aware of that, i have read that can also be an issue with the Subaru Syn oil. Then again i have also read that Subaru oil is repackaged Castrol Edge.For some reason Mobil 1 5w-30 seems to have shear issues in turbo applications for some people..
that would be great!I had the Subaru 5/30 oil tested by blackstone. I'll post the PDF later if I can.
thats a informative link, i had read through it before.https://forums.nasioc.com/forums/showthread.php?t=2714154
i went for Mobil 1 ESP Formula 5W-30 Motor Oil
are you attempting to test the limits of your engine or warranty?I have been using the wal-mart oil since first change. Oh and I change at 8-10K intervals. 39k now. We'll see how it goes. Don't do what I do, though, until i get to 200k.
i was thinking the same thing, im not sure what numbers he could improve upon.That's a pretty good analysis. When they are telling you to expand your oci that's good
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No, just think oem intervals are conservative. Especially for the way I drive. So far on all my cars i've been right. I guess I have no reason to think wrx is any different.are you attempting to test the limits of your engine or warranty?
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Not sure if it changed, but subaru oil used to be produced by castrol.Everyone keeps referencing "Subaru oil," but who is the actual oil manufacturer? It's not Subaru. FWIW, my dealer uses Penzoil.
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