My truck

2011 F-150 FX4 Supercab
5.0L V8
3.73 rear end

City MPG = 17 (Converted) = 13.8 Liters per 100km
Highway MPG = 22.5 (Converted = 10.4 Liters per 100km

Avarage Mixed City Highway = 19mpg (Converted) = 12.3 Liters per 100km

My truck came standered with the 36gallon gas tank or 136L tank and I can generally go between 630 to 650 miles per tank of gas...Or 1.013 to 1.046KM per 136L of fuel.

Hope this helps. I consider this mileage phenomial considering that my truck is a 5500lbs 4X4 V8 gargantuan. But on a side note, I do drive pretty easy to conserve fuel and reduce wear and tear.

Anyway, good luck!