I am switching this string to OT as Bill Steele reminded that it is a stretch to consider this topic caving related.
The "linear" savings is a little deep for me but there may be a non-hybrid car or two that averages 40 mpg city and highway. I seem to have read recently that VW produced a small sedan, I believe a Jetta, with a small diesel engine that averaged at least 40mpg. How about it, David, am I remembering correctly? I don't consider a Smart for two a real automobile. Fritz
