Thread: Oil Viscosity
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Old 03-15-2009, 08:14 AM
btbiii btbiii is offline
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Location: New Jersy
 
Join Date: Mar 2009
Posts: 49
Mein Auto: 1992 325I
Oil Viscosity

I just purchased an 1988 M3 Thursday. The previous owner has been running 5W-30 & 10W-30 Oil in vehicle. I have always run 15W-50 in my previous E30's per the original owners manuals. I have a Chiltons manual that also calls out 15W-45/50 weight oil. Which is correct? Thanks in advance for any help.
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