Gas mileage has been on my mind lately, too. I think I get about 12 MPG. I've been tossing around the idea of selling my truck and getting a more fuel efficient vehicle. Although, I really don't like my options for the price of vehicle I can afford. I really don't want to cram my 6 foot 2 body in a Smart FourTwo Passion nor would I want to be seen with one (shudders).
Basically, it's like this. On average, I drive 150 miles a week. Currently, gas is 2.15 per gallon; so, $34.4 to fill 16 gallons. This translates to needing to spend almost $27 per week to meet the 150 miles I drive. So on average, I'm spending about $1400 per year on gas or about $116 per month. Now, if I were to get a car which gets 30 miles per gallon, the costs drop a ton. That $1400 per year drops to $559 or $46 per month. After looking at the savings, the thought of a car payment doesn't feel so bad. However, I have yet to see a compact car which I like. The Mini Cooper Clubs look neat, The Fiesta is a no go (I had one for a while) and I wouldn't even touch a Chevy Sonic or a Fiat.
Personally, I'd like to stick with an older vehicle. I've always wanted a classic VW Bug. But, I doubt I'd fit too well.