I like the idea of putting your MPG on the back window especialy for us folks that can beat the hybrids.. Every ones gaga over 48 mpg hybrids.. when many moded hondas can pull that down on the highway.. then put ecomodder.com under it.. make it big enough to be readable from a distance.
Ideally the scrooling LED billboard would be great.. you MPG, ecomodder.com, then top driving tips and how they increase MPG.. like 1. slow down to 55mph, gain 7% on your MPG compared to 65mph ....
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