The gasoline manufactures in the US haven't even been trying to build fuel efficient vehicles that run on petroleum. You could make a chainsaw engine pull a real horse around with the right gears. Not very fast of course which brings us to another point. To do a hundred miles an hour you need an engine and transmission combined with a drive train that needs more gas than say one that will only do fifty five miles per hour. You see America can build whatever the petroleum suppliers need to keep people here and the economy going for many many years. The problem is you need to know what fuel is going to cost. Manufacturers can't build for roller coaster oil price economics. They sell cheap oil people can afford a guzzler. The price goes up, people buy mizers. The manufacturer builds what they can sell. At today's high prices, mizers. If the price falls, what then?

dogor,