Finding we get a stable 21-22l/100km with the Panda behind the diesel V8 LC200. Normal highway in 12-13l/100km without the van.
Much the same overall economy wherever we have gone - Qld via Newell, Adelaide, Lakes Entrance, Queenscliff, etc...
We (1) do stick to the speed limit of 100 or 110 and do overtake slower vehicles.
Worst was 24-25l/100km when we did the Bruxner Hwy from Byron Bay back to Clunes-Lismore - slow going through the hills and national park.
Typically have full 90lt water tanks, full 150lt fridge, full Engel in back of Cruiser , bull bars, winch, etc. family of 4.
Van ATM 2,467KG