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      03-06-2013, 08:27 PM   #10
Second Lieutenant

Drives: '09 335i E90
Join Date: Nov 2011
Location: United States

Posts: 295
iTrader: (0)

Google Mike Miller's Old School BMW Maintenance Schedule. He explains the difference between the two fluids quite well. I was going to copy and paste that section but since it is copyrighted I won't.

In short he says if you have a limited slip diff you need to use 75W-90. If you have a open diff you can use either 75W-90 or 75W-90NS.