[MetroMPG]

If your average MPG display is resettable on the fly, and it's easy to switch back and forth between the instant & average screens, there's no real reason you need to go to get another gauge.

Use your average display to start recording the "to work" and "to home" legs of your commute so you can start challenging yourself to beat your previous high score. Instant is best for when cruising, if you want to "target drive" at or above a certain MPG number.

Start working on those aero mods.