trayback consumption 300 tdi
	
	
		in the highly streamlined trayback the fuel consumption generally is with less than half a tonne on the back 
 95km/hr indicated 9.5l per 100km 
100km/hr indicated 10 l per 100km 
my old hz ute had significantly better fuel economy with the torneau cover on compared with the back open
long range cruise in not much traffic at 90 km hr on multi lane highway seems to sit just below turbocharger whine at 9 litres 100km and seems to be a comfortable speed.
There is a write up on a truck freight company that found sitting on 90 km/hr indicated saved lots in fuel and didn't increase the travel time by much. Will try to find it