Worse still, fuel costs are the one variable under every pilot's control. Maintenance bills, insurance, hangar rent and other costs stay about the same no matter how much you fly, but if you don't fly, you don't have to buy fuel. And there is a large emotional involvement in fuel costs no matter if we are pumping it into our car, boat, home heating oil tank or airplane. Most bottled water costs more than gasoline, but we don't think of it that way. I guess it's because the price is posted on every pump or at every FBO, and we are aware of the cost every time we fuel up.