Yea, my jeep gets 12, wife's truck gets 10. Both are paid off.
We did the calcs based on 3.50 a gallon, using our mileage we drive a year.
To break EVEN, we got to buy a $13,000 car that got 28 MPG. Obviously, a little more mileage meant a hair more money to spend, but remember this is the BREAK EVEN point. So really we were looking at driving a used POS buzzbox to save what we would spend on a bottle of wine at dinner.
No, I don't like spending $70 a fill up vs $50, but it isn't the end of the world either (they canceled the whole global warming thing)