GM Mileage 6.6 gas & Diesel
Looking to get real world towing fuel mileages while towing a 6,000lb travel trailer. I would love to hear from anyone towing that size trailer with a late model GM 6.6 gas or 6.6 diesel as well any c...
Forum Discussion
Grit dog wrote:
OP, great question, but at the end of the responses, you won’t have any succinct info anyways. There are just too many variables, not the least of which is the owners “perception” of their mileage.
Factor in everything else to make your decision, imo. Diesel will be about what is expected at 20-30% better mileage if comparing apples to apples.
If gas is getting 8 mpg, 25% better is 10mpg. I got 9.9 in 2020 hauling my trailer to/from Kansas with a CC Dually Dmax.
I got 9 in 2021 hauling my trailer to/from Iowa with a Express 6.0. I stayed off the interstate on the trip home. I added a wind deflector (that was a $20 used purchase) that seemed to help.
