more 7.5 a km i think.
MY girlfriends car does about 6.9-7.1 and thats 45-50mpg.
Dont know how much i do to a tank, got no fuel guage so have to fill it up every 300miles just incase... motorway runs its good on fuel. ill probbaly fill up tomorrow, the MPOG wont be good though as ive driven round town a lot. ill let you know how much though. On a run 300miles would take about 33-36 litres at about 85mph.
I actually write down the miles ive covered and how much i fill up by each time i go to the petrol station. maybe i can get a photo of the paper to prove it.