Quote:
Originally Posted by freshxdough
All BMW require 91 octane 89 minimum. 93 if you're on the east coast.
M40i is considered an MPA (M Performance Automobile). It is not an M engine but you could say it is inspired by M. Most Mxxx cars have louder exhausts, sportier characteristics and typically M sport body and trim.
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Why 93 for the East Coast vs 91 elsewhere?