well after my little Euro-trip I did a swift calculation of my total fuel consumption and had a (to me!) reasonably pleasant surprise...

average over 2,518 miles was roughly 27mpg (that is UK gallons) which when I consider the cruises @ 95-125mph for prolonged periods as well as quite a bit of town driving not to mention some STEEP mountain passes (Furka Pass is 8,000 feet ).

there were a couple of points where I'd guestimated the mpgs as being between 32-36 (in France averaging 75/80 for a few hundred miles) but obviously that does mean that some of the town driving and higher speed stuff was, shall we say, a little scary!!