Rick Monday in comments from a previous post has a helpful consumer tip:
Here is a little community tip. I live near Thorntons [gas station on Wabash]. Whenever they spike their prices, last week I think it jumped over 30 cents/gallon in one day, I head over to Sam's. Sam's doesn’t usually increase their prices throughout the day.
You’ll need a Sam’s Club card to get gas there though. I recommend anyone who buys a lot of milk (and gas) to get a Sam’s membership. The lower price of milk alone pays for the annual membership.But back to gas prices in this city. I really don’t get the sudden and coordinated 30 cent jumps in price. The price then slowly deflates a few pennies a day until the inevitable spike hits again. It has become routine now. I usually gamble on when the low price is at or near its lowest and then fill up before it goes up. But it looks like Rick has figured out a good way to beat the system.