Hello. Which fuel consumption is normal for M roadster on the open road,out of town,normal driving? Engine is s50b32-321PS . Let's say,which fuel consumption is with normal driving,80 km/h in 4th gear? I noticed there was punctured flexible hose exhaust (part on picture),is it possible that because the car has less power, poor acceleration and higher fuel consumption!? http://i73.photobucket.com/albums/i217/andrewturner/photo-1-3.jpg Thank you.