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Old 03-05-2010, 10:01 AM   #2
1st Gear Newbie
Join Date: Nov 2009
Location: Toronto
Posts: 29
My '95 vintage M42 has 89 octane recommended in the owner's manual and on the fuel filler door, actually it says "minimum 89".
I usually put 91 in the summer because there is slight knocking on acceleration with 89 when its hot out.
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