In our area the Speedway stations (owned by Marathon) seem to be the driving force - when they change, everyone else follows suit. Very unusual for them to do a major increase on Sunday, but the greedy bastards went from 3.64 or so up to 3.85 today. Kroger and Sams usually don't follow until the end of the day, so was able to get topped off at the "lower" price. Can't figure any reason other than exceptional greed for the bump. Interestingly, in Indy their prices are anywhere from 3.55 to 3.85 - no logic.

They have jacked the price about 20 cents a week for the past 3-4 weeks, and aren't taking it down much at all.