Some places offer a certain amount of cents off each gallon of gas when you buy something. Here some HyVee's that have a gas station do this. It doesn't matter what you buy, the coupon prints on the bottom of the receipt. Sometimes I can save $.40-.45 cents at a time. That little bit adds up over time.

Safeway gives you like $0.05 off each gallon for every $100.00 you spend using your club card. Of course our "local" Safeway gas is about 2 hours away! We just save them and they eventually add up!