There are sources from BMW engineers about running E85, and one of the long-term weak lengths were the filters in the injectors clogging up. Not big news, but 24k miles so far with no issue's other than a LPFP that can't keep up with fuel demands in temps lower than 50F (which is a rarity in central gulf coast FL), knock on wood for me
I'm expecting something to creep up sooner or later; we all know our fuel systems weren't designed and tested for anything over at least 25% ethanol content (Brazilian cars).
E90 LCI M3 7-DCT Interlagos Blue/Novillo Silver
sold E92 335i 6MT Space Gray/Cinnamon interior JB4-E50, DCI, Meth 12.6@115mph
sold E46 M3 6MT Black / Black