clipped from: www.fuelfrog.com 
Track your gas mileage by letting us know the miles you traveled on your last tank, the price you paid, and how many gallons you added to your car. FuelFrog will compile and trend information about your gas mileage, the amount you spend, and more! In the near future, you'll be able to compare your vehicle to others and see how you stack up.
FuelFrog loves Twitter, and you should too. We love Twitter so much, in fact, that we've decided to integrate with them. It is easy to use Twitter to tell FuelFrog about your fuel usage.
As we said, we love Twitter. We try to keep our Twitter feed as up-to-date as possible, so that you'll always know what's going on around FuelFrog.