I've been having a bit of, er, fun trying to take the fuel economy of the Pan to extremes.
Step 1 was to really hammer the bike on a trip between home in England and home in France.
To give you the idea, I did 590 miles in 6 hours and 35 minutes. Including three petrol stops. And circumnavigating Paris.
As others have mentioned, the bike calculates fuel consumption in miles per litre but with the magic of, um, calc.exe I have turned it into something more useful. On this trip, I made just over 26mpg (10.7 l/100km for our continental chums). This is low. Very low, indeed.
Just goes to show what you can achieve if you set your mind to it.