4.Ram 2500 Laramie: $141.10
Now that we’ve cleared the $130 a tank zone, we can safely look at some Heavy Duty pickup trucks. The first one on the list is the Ram 2500 Laramie. It takes $141.10 to fill this Ram up from empty. The reason for the costly fill-up? The tank at just 34 gallons is only half a gallon bigger than the expedition at #5, but 34 gallons of diesel fuel will make for one expensive bill at the pumps.