Quote:
Originally Posted by khail19
I always hear everyone recommending the Shell Rotella T6 5w40. I've also heard that the Penzoil Platinum synthetic is pretty well regarded. Personally I just buy whatever synthetic (except M1) I find on sale, clearance, mail in rebate, etc. Right now I'm running Valvoline Synpower 10w30, which I found for $15 a gallon on clearance.
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I'm running the T6 in my Miata. It's pretty much the go-to oil for the non turbo motors. Not sure how well it holds up when it has to run through a scalding hot turbo, but otherwise it seems good.
Then again, I did spin a bearing in my Miata while using the T6. However, I overheated that motor worse than any motor I've ever seen, and it still ran for most of a second day at the track the next day before letting go, so I'd actually say the oil did pretty good. Plus, it seems to be one of the few oils that doesn't coke up the lifters and cause valve train noise in the older Miata heads.
I wouldn't be surprised if the Rotella oils become popular budget oriented oils in the Subaru crowd. Certainly they should be fantastic in the N/A subarus. Not sure yet about turbo use though.