[NeilBlanchard]

Thanks for that, Matt. Another example is C. Michael Lewis' Electrathon vehicle we saw in Watkins Glen, NY. He traveled 62 miles and used 938wH, which is 2,249MPGe or ~15.13Wh/mile.

I agree that weight is very important, though I think it is more important to achieve higher efficiency on each of four things (in approximate order of importance):

Drivetrain efficiency.
Aerodynamic drag.
Weight.
Rolling efficiency.