I use either Mobil, Sunoco, BP or Gulf 93 octane here in NY. I had to put one tank of 87 in the car (actually half) as a result of the Sandy nonsense, but now we're fully back on a 93 octane diet. I notice very little difference in performance.
Merry Christmas all.
2014 535d xdrive ED 4/28/14 Glacier silver, Ivory Interior-Soft Close Doors, Ash wood, Harmon Kardon, Cold Package, Driver Assistant and Driver Assistant Plus, Luxury Line, Lighting Package, Luxury Seating Package, Premium Package