I just wrote a post about carpooling tools online, and on the same website there’s a handy post with a list of tools to help you check gas prices online.

FuelMeUp is one such online tool you can use.  It’s a website that is updated several times a day and gives you the prices of several different types of fuel based on your area.

Another is GasBuddy, which covers the U.S. and Canada, supplying information about the lowest gas prices.