Oi, my truck does 8.5km/L and my friend's truck (which is exactly the same but with two clutches to smoothen it out, unlike mine) does 12km/L. I do have AT tires and 4x4 while he has the stock tires and it's only 4x2 but mine is toggleable.
Why the hell does my truck swallow fuel? I even change the oil and filters not long ago. My friend also likes flooring the truck and going at 150km/h. I usually never pass 120km/h unless I'm passing someone else.