Re: 784 miles, 13 hours, 20.5mpg
Recently drove my new '14 GC Ecodiesel from Antwerp, Belgium to Venice, Italy. Started at around 11am in Antwerp and arrived in Venice at 1am (next morning), 14hour trip with a lunch stop outside Strasbourg, France and a great fondue dinner in Lucern, Switzerland. The total distance of the trip was around 760miles and averaged 32.6mpg (basically one fuel stop).
Not too bad