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omglukewtf · 06-11-2014, 01:27 PM

I've searched but can't find an answer to this. I'm going to replace my diff oil with Royal Purple Max Gear but don't know if I should use 75W-140 or 75W-90

Any suggestions?

06-11-2014, 01:27 PM	#1
omglukewtf New Member 0 Rep 22 Posts Drives: 2008 Z4 M Coupe / 2011 E93 M3 Join Date: Oct 2011 Location: Boston iTrader: (1)	Royal Purple Max Gear Spec for Diff Oil I've searched but can't find an answer to this. I'm going to replace my diff oil with Royal Purple Max Gear but don't know if I should use 75W-140 or 75W-90 Any suggestions?
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