If the vehicle doesn't interrogate the pump and update in real time, then you living in a technological dark age.
I listened to a mechanic give the run-down on gasoline to a new teenage drive once. I wish I'd written down notes. He had about three or four variables to consider. I remember spot-priced oil vs Chevron and summer/winter, but I don't recall the others.
I suspect oil won't be banned until the political situation sorts out. But that's a question for The Lounge.
edit: You're a "Whitey" Bulger fan?