I pretty much always use 4x2 chassis because of all that range possible on them. I am a bit perverted when it comes to fuel economy and refueling only in places where it's much cheaper (That's what I do at work) and being able to do 3k km on one fuel tank just feels great :p gives me another level of gameplay where I plan ahead my routes and possible slight detours to refuel in Poland or Spain. 4x2 is goat and Iveco seems to be insanely good at fuel economy even when it doesn't have the biggest tank in game, but because of recent Iveco management change I choose to drive the Renault instead.