[kstar]

How about this?

The Porsche 911 has long been one of the most fuel efficient sports cars available at its performance level. The new 2009 911 with its direct injection and dual clutch gearbox is rated at 24 mpg (US) combined on the EU test cycle (19/27 on the EPA cycles). That's not an exceptional number around these parts. However, ex-racer and German TV presenter Klaus Niedzwiedz set out to prove again the influence that driving style can have on efficiency. At the wheel of a new 911 Carrera coupe, Niedzwiedz went 400 miles with a sealed gas tank. Over a mix of 19 miles of urban driving, 119 miles of country roads and 262 miles of autobahn Niedzwiedz averaged 52 mph and 35.1 mpg (US). The driving style used for this run is almost certainly not typical of 911 drivers but gentle driving can definitely eek more miles out of every gallon of fuel.

http://www.autobloggreen.com/2008/12/17/hypermiling-in-a-porsche-911-yields-35-1-mpg/