When you think of Mileage Marathons you instantly think of the Toyota Prius or one of the ultra efficient new diesel superminis. What you would expect (me included) is that the UK MPG Marathon was won by a 505 BHP Corvette Z06. The  marathon wasn't about the getting highest fuel mileage, it was about getting the highest mpg above the official estimates. In Britain, the Corvette Z06 is rated at a combined 19.2 mpg, the Corvette then proceeded to get 30.96 mpg (a  61.26% increase). That's a great result for any seasoned Hypermiler but it also goes to show that Hypermiling can make a huge difference in any car.