Quote:
Originally Posted by NIZMOZ
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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yeah royal is not that good, so were theses UOAs specific to the 370 motor?