I'd be lucky to get 12/100 from mine with auto and easy select.
I've always had the 32" tyres, I hope next week with the new caravan that this dosn't skyrocket. I'm not happy that the consumption is so high, but driven like it is (90% around town and 5% offroad and a little highway) thats pretty good considering the power etc.
I'll be anoyed if the consumption gets real high towing, but I'm not a grey nomad YET
One thing to note using a GPS. when stationary a GPS still "moves" if left overnight a gps track file can wander quite a distance - especially if the sky is obstructed (under trees- in the city) as the GPS "fix" is not accurate. Just something to note when comparing distance travelled odo v's GPS