Just went through the same thing, Saturday morning -30C here in Winnipeg, start it up, let it run a while then go. Get 10 minutes away smoke, smell, oil blowing back from the front of the valve cover down the side to the exhaust. Took it in Monday morning needed to replace valve cover gasket and clean out condensation from breather hoses. Turns out these don't like to idle very long.

So moral of the story start it up let run a minute or two and take the long way to work to get fully warmed up.

Thank you Warrenty, the valve cover gasket is apparently a 1.9 hr job?!? plus parts = ~$400 w tip and taxes.

While they had it I told them to leave it out overnight and see if they could find where an occasional, only when it's real cold, fuel leak was coming from. Turns out 3 injectors were blowing gas out the top. By the time they got it inside on the lift, up in the air, saw that it was not from the main line, let it down and got the top engine cover off the leak had stopped (engine slightly warmed) but the spary was still visible on the inside of the plastic cover over the fuel rail. Turns out Warrenty is replacing the seals as well.

Cold Sucks!