I've been running the sport map, and I'm in norcal so 91 is all I can get. E85 is out of the question. I'm going to change my plugs, but I'm having trouble figuring out what the exact part number I should be ordering is.
Peter Pan BMW wanted 47$ per plug, East Bay BMW wanted 30$ but they only have one. Most of the threads on this site mention like 4-5 different part numbers, and everyone seems to have problems with everything.