Originally Posted By: qdeezie
For what it's worth, the vehicle in my auto-signature with 333K+ miles has been on synthetic oil and P1 filters since the first OCI and it still runs as good as new. In my pre-BITOG frame of mind, P1 was the "best" to me. Now I know about Wix, Fram XG series, Royal Purple, Amsoil, M1, K&N, etc. All of those are excellent filters to me.
I have run engines beyond 300K miles on store brand oil such as SuperTech(Wal*Mart), AAP(AdvAutoParts), ProLine(PepBoys), Spectrum(SEARS) or anything on sale/rebate, and using FRAM orange can of death(OCOD) and PuroPremPlus(A.K.A. Classic). Rust here in the North East(NE) finaly got the better part of the car.
Oh yeah, and I have been mixing oils, like, forever!