Yeah I think you're beating your head against a wall trying to explain stuff like that to Aussie's.
So they drive a lap around their flat island sandbox in their tiny trucks with "caravans" and it's some kind of accomplishment because some of it isn't paved?
Heck, I could put more miles on in one trip from Florida to Alaska and back.
We just got back from a 14 day trip from Western Wa, thru Eastern WA up into Banff and Jasper, then thru Yoho and Kelowna then down the Coquihalla into Hope and back home.
My 15' F450 had over 3000 lbs in the bed, trailer loaded up was only at 10,500. Truck is lifted on 35" Toyo M608's with 4.30 gears. Pulled some nice grades on that trip...two that stuck in my mind were Kootenay pass, and the climb up out of Kelowna...no clue what that one was called.
Hand calculated mileage for the entire trip including about 30% of driving without the trailer was 11mpg.
I was pretty happy with that at first, but then I read this thread and was reminded...the Aussie trucks could have done the same thing and gotten 12.5 mpg....