I have a Scania R Series truck in the game, and have the 6x2 Chassis. Now, i'm looking for a bit more power, and am thinking of going to the 6x4, but I would also like the greater fuel capacity like the 4x2. So, my question is, will I get the same power on the 4x2, as I would with the 6x4? Does the 6x4 give me greater pulling power for heavier loads? I'm confused!!!!