BarneyS wrote:
Unless you are going up and down a LOT of hills or mountains, or doing a ton of starts and stops, then the weight of the water will not make any difference in your fuel mileage. It is the frontal area of the rig that makes the difference and the speed at which you tow it - not the weight. Once that weight gets rolling it takes very little HP to keep it going.
Barney
I tow it about 60-65 when possible. I know what your saying so what would you estimate the difference if driving mountains? I live in the desert but I go to the mountains, everything is up from here...