long distance towing questions with 1978 c30 3+3 dually

[dieseldawg142]

Originally Posted by DieselSJ

What the ?? My CC Dually gets 10-11 empty and I can pull 9 towing if I keep it 60-65.

weight= around 16k with the camper, quads and boat....
gears= driving 4:56's down the freeway with a 1:1 ratio in the trans, like driving your car around in 1st or 2nd, and with the weight.....
aerodynamics= with 39" tires, everything is hanging in the wind like a barn door, and the gears and the weight...
terrain= live in the mountains, 10-20 km hills are pretty common around here, with the aerodynamics, and the gears and weight....
= p poor fuel mileage...