Wife and I just completed a 1000 mile (1600km) 4 day trip in West Virginia on our 2013 Norge. Very little highway, lots of mountain roads, many twisties. Bike hit 6000 miles on the odo on our way home. We rode 2 up the whole time, and fully loaded side and tail cases on the way there and back. Bike averaged near 40mpg (5.88 liters per 100km) during the trip. I'm not a slow rider, and definitely pushed it through the twisties! Milage seems to be improving as the bike ages. I was averaging around 36 mpg (6.5 l/km) when it was newer.