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.

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2011 535xi Cold, Prem 1&2, Convenience, Driver Assist, folding rear seat