i have a new 09 and i have @4hrs and half a tank. it will depend on your riding style/terrain and machine set-up but from my research on here you should be in the 10-20 miles per gallon range- i will let you convert =)
wifes BF, the 07 carb type(stock), with the neck pulled out get the extra Litres into the tank, got over 140km out of the tank, then need to admit that the last bar had been flashing for a loooooong time, that was high speed gravel roads, on the 400miles in one day trip!!
maybe the EFI, depending on riding style could get a little more!!
they are not light on fuel,actually heavier then the V, specially when I ride it!!:lol: great to ride though
I get close to 13 in the winter, 4x4 all the time throttle wide open all the time, and 15-16 in the summer, 90% in 2x4 some mud and lots of wide open throttle on mine. I have 26" XTR's and no other mods.