[MetroMPG]

I honestly don't think the conversion from L to G at fill-up time is that big a deal.

To clarify: you haven't bought one just yet?

You don't necessarily have to get the top-line SG-II unless you plan to program additional gauges or drive a hybrid; the SG-E is much less expensive and will help you save fuel just as readily.

Also there's the Ultra-gauge, but I'm not as familiar with it.