Being in the Navy I have run both extremes. Don't even ask what the cost for JP-5 (Aviation Fuel) or FD (can't remember what it stands for but the gas turbine engines on most of the ships run on) is for a 7-9 month deployment. But, the other extreme is that the aircraft carrier doen's spend money on it's fuel ldue to being nuclear. Although, I am not even going to venture a guess on the total cost of a nuclear rod!!!