I'm in Calgary, hitting 27,000 KM, my unit is 2015 Jan production, no issues, all is well. When the temperature is consistently below 10c, I use winter covers. I use the Edge monitor to watch all the temperatures and set alerts. When I first bought the truck, I did get an evic once, which they replaced a warp part. Wasn't aware of REGEN that much, Edge fixed that.
Last December, wash truck for trip to Ainsworth Hotspring, the next morning, it drop to -27 C. Took the trip, lots of moisture and I did get an evic, lost 5v. Once I got to Cranston, I did a clear and it never came back. Edge save me a nuisance trip to lousy Dodge dealer.
Just recently took a trip to Vernon, BC with the trailer, (6,000 lbs), watch my oil temperatures, it did climb a little over 250 F and my coolant climb to 225, when climbing the steep hills, once that happen I back off with the cruise and return to normal. Conclusion, when towing on steep grade, don't use Cruise control. I have concluded, the truck not design for that, over rate specs.
Last year, my EGT1 and EGT2 would peak 1500 F, but not this time. The only thing different, is my fuel, I still using Shell V-Power, it seems to improve things overall. Fuel economy improve by 2 when towing, it seems so far.