I have to wonder how long before the self serve stations start charging less due to the lowered operating expenses from not having to pay someone $12/hour to pump gas.
At one point, the attendant would at least have to be able to make change.
Now all they have to do is swipe a card.
Around here they do usually charge less. There will be stations with both options and the self-serve pumps are a dime cheaper.
But we see huge variation from town to town.
Here in Michigan we see a huge variation in price, but it's over time, not necessarilly from station to station.
Over the last year or two prices began regularly jumping by $0.20-$0.30/gallon in a matter of hours.