Been skiing in VT this past week, when that bad snow storm hit the eastern states. We had temperatures dropping overnight to -17C, with windchill down to -28C. I had no problems with the car whatsoever:
- engine started right up, with normal 2-3sec pre-glow
- battery held up nicely
- no issues with DEF
- no issues with diesel fuel (I did make the point of getting there with approx 1/3 tank and filling up with "local" diesel)
- no issues with getting up quite steep hills - torque was amazing!
- no issues with my winter 18" bridgestone all-season set
As for MPG, I've averaged 21.3 mpg on 715-miles trip, which included LOTS of idling, sitting in traffic, driving 80 mph on highways, and constantly climbing hills here and there. The range on full tank was about 530 miles. Car had 2 adults, 2 kids, fully loaded trunk (up to the roof), roof box with gear, and bags on the floor in the 2nd row. There wasnt much space left in car for anything else

I am SO impressed !
Pics attached... Mine is the one with silver "YAKIMA" letters on top. The other 4.8i is genemish's, and the other 35i is of a friend (somehow snowstorm dumped more snow on his car, go figure...

)
Pics by Canon T2i with 18/270 Tamron lens and polarized filter.