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Quadra-drive II diff oil....royal purple vs. Mobile 1

6K views 10 replies 4 participants last post by  NHWK05 
#1 ·
OK folks....let's hear everyone's opinions/experience. Mobile 1 75w140 vs Royal Purple 75w140...
 
#3 · (Edited)
Royal Purple will cause the MDS to shift a lot harder. There is a thread on this already. Never use anything outside of OEM when it comes to certain thing.

Royal Purple would be fine in my 3.7 with no MDS but would could cause a disaster for your engine.
 
#10 ·
I have no clue but I do understand what you're saying.
 
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