22-24 model year for FX4 PKG gives you mud ruts drive mode. May have helped maybe not. AWD system on these is very capable good tires maybe all you need. Also FX4 available with the 4K tow PKG unlike the tremor.
I usually see 2-3 mpg's difference between cold and warm weather driving in mixed highway/city driving. I see as low as 22 mpg in cold weather and as usaually around 25/26 mpg in warm weather mixed driving. If I'm traveling with all highway driving in warm weather I've seen as high as 31/32 mpg...
This video popped up by chance in my youtube where a guy was showing the under side of 2022 awd ecoboost and points out the coolant pump for auto stop start.
My understanding is that the coolant does not stop cirulating during an ASS stop. The mechanical pump stops but there is an electric pump that continues to circulate for the HVAC and to prevent overheating. Could be wrong but thats what I have read.