The winners on the EPA’s annual list of the most fuel-efficient cars and trucks are losers in the marketplace. The most fuel-efficient cars, those getting at least 40 mpg, represent just 0.57 percent of the U.S. market. Light trucks such as the Land Rover Range Rover — the least efficient SUV on the EPA’s list, getting just 12 miles per gallon in the city and 15 on the highway — account for 48.08 percent of the market. Top marks from the EPA went to the Honda Insight, which will go on sale in the U.S. in December; the two-seater gasoline-electric hybrid gets 61 mpg in the city and 70 on the highway. Volkswagon took honors in the subcompact and compact categories with its New Beetle, Jetta, and Golf, all of which get 42 mpg in the city and 49 on the highway.