And on top of the incredible savings in the cost of fuel, you could sit in your car while someone pumped it for you!
Pilot/Flying J also has a card that gets me, I think, 4 or 5 cents off per gallon of gas. That adds up when you have a 55 gallon tank! I always look for those truckstops first. :)
Gas here is 2.68 without discounts but alas, we must pump it ourselves.