The rear end of the new Corvette Stingray is displayed after its unveiling in Detroit, Sunday, Jan. 13, 2013, the night before press days at the North American International Auto Show in Detroit. When 1,000 GM engineers and designers started work on the next-generation Corvette, they began with the usual priority list for a muscle car but topping the list was something that belies the roar of the Chevrolet&#39;s giant V-8: Gas mileage. (AP Photo/Carlos Osorio)