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All of these are good, but I have seen enough UOAs that prove Royal Purple causes more wear on cars and doesn't like extended intervals. Best to worse Redline Amsoil
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#11 (permalink) |
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All of these are good, but I have seen enough UOAs that prove Royal Purple causes more wear on cars and doesn't like extended intervals.
Best to worse Redline Amsoil Penzoil Ultra Penzoil Plat Castrol German Mobil 1 Motul Royal Purple Castrol Syntec
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