Just an idea that im throwing out here. I know that there are quite a few people on this thread that live in or near ames and i usually visit a site that lets users update gas prices around the area. you can get a live feed to put on websites and thought this might be a good idea for the people around here. for the ones that dont live in ames, you can type in your zip code and it will give you ones in your area as well.

Ames Gas Prices - Find the Lowest Gas Prices in Ames, Iowa

and if youre looking for cheaper gas get a sams club membership. i think ours was $20/year and you more than make up for that in gas savings