A lot of American cars(Sedans and coupes anyways) aren't v8's though anymore. Just more powerful cars like the srt8 and srt10 from Dodge, a 300c variant from chrysler, higher end Camaros, and Corvettes. Which cars like that, people all over the world buy over powered cars like that. Other than that, trucks and vans which need that power. But not all American people drive high end cars that consume so much gas. I drive an 01 Neon SRX. It gets about 30-35mpg. I'm okay with that. Also, there are cars with low hp and torque here that sell for less. Aveo, Focus, Cobalt, Cailber, Avenger, etc. Cars in the States though, all have wide varieties of different vehicles. And for us, we've got pretty decent gas mileage for cars that have a bigger engine and have more power compared to European cars. It's a country thing here. People here in the States don't want small cars like the Smart car. For us, small cars today are cars like my Neon, which actually the Neon is big lawlz. This can be argued about almost anything. Another example, sports. Europeans would prefer sports like Soccer, where as most people here in the States go for Football. Now I'm not going to lie, over here there are still cars that don't even get 20mpg. One is the 2010 Charger. The base model only gets 19mpg. But then that's Dodge for you. Their priority in cars is more power versus cars like Ford, that are made for decent mpg.