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E30 M3 (1986-1990)
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#1
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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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#2
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I went to s14.net and they posted 15w 50
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#3
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+1 lots more info on there
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