The 2013 Accord is the first Accord to feature Eco Assist, Honda's revolutionary, fuel-efficiency technology. Eco Assist has two components that work together to help you get more miles from each fill-up.
Push the green ECON button and your Accord automatically configures its fuel-consuming systems to optimize efficiency. Push the button again to return to normal mode, and get the zip and acceleration back.
The speedometer is flanked on each side by coaching bars that change from white to green, depending on how efficiently you're using your fuel supply. Keep the bars in the green, and you'll go farther on a tankful.