Does anyone know what the MPG for a 2007 QC 1500 4x4 5.7L Hemi with 33x12.5 tires towing 4500 lbs?

 

Not sure about 4500lbs but I just got back from a 400 mile trip and averaged 13.3/mpg pulling 1500 pounds in a stock 08 QC Hemi. I drove nice and easy for the first half there and then not so light on the gas on the return. About 80-90% of driving was with the trailer.

 

I have about the same setup as you. My boat and trailer go about 4k lbs, on the flat freeway doing about 60 I get about 11 mpg once I get into the hills it goes down to about 9 mpg.

 

My standard cab will get about 11-13mpg towing my Nova and full car trailer (4500lbs) on the highway. Stop and go, Pfffft...looking at 9ish....