Orel, what sort of work are you doing, ie what weights are you carrying and on what sort of roads.
If you’re in varied country, some hills lots of roundabouts and junctions and over 40 tons regularly then that fuel is probably right…could be worse my mate has a new 440 Daf far heavier on fuel on that sort of running.
Not trying to teach you to ■■■■ eggs so don’t take umbrage at this but have you tried overriding the auto box (if you have one) and driving it manually when loaded, make it work instead of the auto box revving its ■■■■ off, keep the revs between 900 and 1400, in other words when going up the gears change up at 1400rpm, and don’t use the brakes either, i’m serious here use the exhaust brake and gears to slow down and only use the brakes to actually bring it to a halt.
That’s how i drive (we run full 43 tons when loaded) and and my fuel consumption is better than others who leave the auto box to it and drive on the brakes, i also cruise at 82k’s normally @ 1200 rpm locked in 12th manual, very good on fuel at that speed.
Try it for just one day and see how you get on…no offence meant mate, just suggesting what has worked very well for the one i use regularly, you might just be surprised.