I have one local station with NO ETHANOL 91; if I can't there. by 2nd choice is Shell 93 Octane (has ethanol in my area). Noticed a huge difference in performance with the non-ethanol on my 2010 535I, not quite as much on on the 2011 535I.
2013 335I X-Drive - Alpine White / Coral Dakota / M-Sport / PPK / DHP / Sport Auto / Premium / Cold Weather / Tech / Harmon Kardon / Rear-view Camera / Park Assist
Gone 2011 535I X-Drive - Space Grey / Black Dakota / M-Sport / Sport Automatic with Paddles / Premium I / Premium II/ Cold Weather
Gone 2010 535I - Alpine Wht / Blck Dakota - Sprt, Premium, Cold Weather, Sport auto, Anthracite Liner, Nav, Satellite, HD & I-Pod
Gone - 2006 530XI -