I'm not really buying the 70mpg claim for your Metro. I had a metro, and it was almost always at 52 mpg averaged over about three tanks of gas. It is possible that you drive more efficiently than I do, but that is a mighty big spread. My Suzuki Swift (4-cylinder Geo Metro) was pretty consistent at ~42 mpg. Other than, that, I completely agree. There really is no excuse for 30 years of innovation, and the move to hybrids for gas mileage to have gone down. Sure, newer cars are heavier, but new innovation should have more than covered the difference in weight.