Rams/Hemi's gas mileage sucks - fact
3.92's are for pulling, not mpg's - fact
Towing 9k lbs bumper pull you should be in an HD - fact
A Limited is probably the most poorly suited for towing due to low payload. It is just a heavier vehicle with all the added gadgets (resulting in decreased payload) - fact.
Can you post a pic of your payload sticker?
If the ecoboost was that good to you I would have stuck with it honestly. Did you expect to get 10-12mpg while pulling a 9k trailer at 70mph with the Hemi? If not then was it really going to be a benefit going from 7mpg to ~9 mpg for a few times a year by swapping from a turbo to a N/A?
If I set the gear limiter in 6th and want to go 70mph that lil hemi will be screaming. I know you guys say it likes the rpms but I would imagine gas mileage would be around 5mpg. I would like the ability to put it in 7th and lock it there.
This trip was with the tow haul button on. I did experiment with the button and the truck actually seemed more apt shift to 7th and maintain it with tow haul off.
I wasn't aware of the hurricane engine. I couldn't swing a brand new truck either way so it probably wouldn't have been an option.
I usually tow without tow/haul unless I get into steep grades, and have no problem with the HP that is available. On the level it runs just over 1500 in 8th, and on a 3500 mile trip averaged over 12mpg hand calc, going from central WA to Phoenix and back again towing over 9000. admittedly I have a pick-of-the-litter truck, but these trucks are not the dog that they are made out to be by some.