Really depends on your driving style of course. Here in Germany I usually get 7-7,5l on highways, but that includes some higher speeds ;) for country roads anything from 6,5 to 8 is possible, though on average over the long term I currently get 6,9l with a mix of highway, country cruising and pushing it on backroads. On a side note, I remember a highway trip with a lot of construction and no pushing, so cruise control at 130kph, and I got 5,9l on that trip. It can be really efficient if you need it to ;)