As gas prices inch toward $4.00, Americans are trading in their older model vehicles for new, fuel-efficient ones.
We already know that the more fuel-efficient a vehicle is, the more money is saved on gasoline; this graph puts how much savings that is into perspective. [REUTERS]

![As gas prices inch toward $4.00, Americans are trading in their older model vehicles for new, fuel-efficient ones.
We already know that the more fuel-efficient a vehicle is, the more money is saved on gasoline; this graph puts how much savings that is into perspective. [REUTERS]](http://25.media.tumblr.com/tumblr_m0u4ykIt9N1qmaoalo1_1280.gif)