Recent gas prices have had me paying more attention to my gas mileage than ever had before. I had a general idea about what I was getting but frankly I never knew if anything I was doing was helping me to save gas and cash. Fuelfrog is your personal mileage log. All you do is start an account and fill in the data like price per gallon, mileage, and how many gallons you purchased. It does all the calculation. Now I could do the math with paper and pencil but it would only be numbers. Fuelfrog, after the second entry, creates a graph making it easy to visualize how you are doing. I like this sort of web application that is done well and is very easy to use. If you are a gearhead or just want to watch the gas numbers like a hawk then Fuelfrog is for you. Give it a try.
Note: George Carlin portrayed Fillmore in the animated movie Cars.