Recent content by jeepxj

  1. J

    Is royal purple a groupIII oil? Better than m1- pp

    Hi: I recently emailed RP regarding the issue of Group 3. Their reply was that they use no Group 3 at all. The basestock is Group 4 along with some Group 1 additive carrier oil. I assume that is alot like the old Mobil 1 was. Hope this helps.
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