[Matt Herring]

So based on the graphs you posted we should assume that for every car on the road the average car in the US consumes approx. 500-550 gallons of gas a year and gets roughly 17 mpg?...Interesting.

I'm a little foggy on "per capita car" which may include vehicles like shipping company truck fleets, taxis, etc? The gallons consumed and mpg seems to be in line with that I would have guessed. (Before finding ecomodder I was probably right around those numbers in consumption and efficiency).

As for Wyoming...my only guess is that there is more open space which means people have to drive farther to get where their going (work, grocery store, etc.). It does seem a little crazy though!