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Old 08-19-1999, 09:14 PM
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Michael Michael is offline
Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
I run Redline 75W90 in both of my cars' differentials.. I'm confident that, especially in the differential, synthetic's the way to go. And definitely clean the vent properly while you're in there!

Best of luck, Michael
'92 500E
'88 300TE