I just traded my M3 for this and am a credit nightmare so no more trades for me for a while regardless of what gas does.

Also, I occasionally alternate between a tank of Premium and a tank of Mid-grade depending on how much the individual gas station is gouging for each one.

Sometimes the independent gas stations GOUGE for midgrade and price Premium reasonably, other times they try to justify a 40 cent price premium over regular which I REFUSE to pay. I try to use QwikTrips, RaceTracs etc as often as I can to not have to deal with the BS independent gas owners pull with the prices of premium and mid.