[ToughBowtieTruck]

Gears don't really matter. I owned a crew cab dually 4x4 and 2wd. Most I ever saw was about 8 on rainy days. 7 mpg. No matter what. Cold, hot, empty, pulling 15,000 lbs, a/c on, etc.

These things will kill you on gas cost if you aren't working the engine. And it takes a LOT to work a 454. They are great tow rig engines. I live 6 miles from town. 2 gallons of gas for a town trip. When gas was $4.00 a gallon and I was making 10 dollars an hour, well yeah...hours pay for a trip to town sucked.