[hk20000]

^ true that, but in terms of what I demonstrated if you are really penny pinching you could easily pull out how much more money the worse fuel economy car is going to burn through during the ownership period.

Or in the scenario where you consider trading in your gas guzzler for a fuel efficient new car - how much are you paying now vs how much are you going to save for the life of the car.

mpg is more like just a figure until you do the maths. It's as meaningful to anyone as how you rate chicks an 8 out of 10 - but a 1 chick is disfigured compared to a 2 chick, yet you are probably going to bang an 8 just as readily as a 9 chick. gp100 is useful like "that watermelon is 8lbs" and the price is $0.5 per pound, then you know the watermelon is $4 for your summer enjoyment right away.

Now I want a watermelon. Or a 9 chick. Or both.