My Prado 4.0 on a good day has given me 11 with controlled foot, 10. 2 from Islamabad to Haripur via Motorways and on lesser controlled foot, 9 very often, and 8 in routine Islamabad drive.
I hit 7 when going totally uncontrolled footwork.. 
That's fuel efficient enough for me from this size engine.
Have photos of all above trip averages.