A simple fact is that most Americans who drive V-8's don't need them. The only reason to own a truck or SUV with a V-8 is tow something. But we love our big rigs. Around my area, more than half the cars on the road are big trucks or SUV's, and people are just driving around town, buying groceries, and shopping. I can't wait for gas to go to $5 a gallon. I easily live within bike range of anything I need to live. That's another problem in America, everyone wants to work in the city, and live in the country. Good luck commuting when it costs $150 to fill up. A whole lot of people are getting ready to spend their entire paychecks on getting to work.
That's America, too much greed, not enough conservation.