[jbernie]

Of course it would also help if all vehicles could turn the engine off when at stoplights etc etc, if the average fuel economy for the entire USA went up 1 or 2 mpg the savings on gas would be massive.

Then again there is also that whole issue surrounding needs. I could buy a very fuel efficent vehicle to replace my pick up truck but then again that might mean I would need to make 70 trips in my small car to do what I can do in one trip with my truck.

Obviously if you are single, live where there is no snow, do not go on trails, do not need to tow anything etc etc, then a Tahoe might not really be what you need.