Originally Posted by Solace
As the owner of an F800S for a year and almost 23k miles, the fuel tank and cap placement is one of the great features. I don't have to unstrap and restrap my tankbag every time I stop for gas. Awesome.
Since my fuel economy is very high (63mpg in interstate cruizing) the net range per tank is still over 200 miles.
I would guess the F800GS can deliver similar results.
This month's issue of BIKE has a fuel consumption challenge for their long-term test fleet. The 800GS walked it, with something like 225 or 240 miles on one tank (I can't remember the exact figure).