I have been monitoring mine for quite a while now, used daily, mix of back roads and motorway and it's returing 10l/100km. Back road max speeds 50-60kmh motorway 120-130kph. Distance covered is 26km per journey, of which 10km is on back roads. I have noticed a better return coming home - straight onto motorway system then the morning run in. It is an average, which strangly the consumption increased after a major service and has now settled back down.
Straight motorway runs come in at 8l/100km when cruise control is set at 2500rpm.
For darrenmax, run is between rijmenam east/keerbergen west to zemst (backroads) then e19 to a201 nato crossroads!. Motorway journey is e19/ring/e40.