easy, you may not be an engineer but you seem to know a lot more than i do... i recently put high-mileage oil in my camry because, well, it's got high mileage (249000 miles last i checked). but it doesn't leak/burn oil and everything runs great. in this case is it even worth it to use special oil? i usually don't.
actually, you are an engineer, aren't you? just not automotive.
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