Here you can see the Environmental Protection Agency's gas mileage ratings on cars you can buy in the U.S. The Toyota Prius, called by some denigrators, "The Pius," has the best ranking. Lamborghinis the worst. In fact the worst car in each category is European-made.
Smart Car, French, is the winner among two-seaters. But it can't compete with the larger Prius, a popular hybrid car.