RE: Temperature Outside
Well, all I can say is that you shouldn't need to worry about the temperature. I'm currently breaking my DT-10 in, here in England.
The temperature is around 3 - 13 degrees here in Newcastle, and my car runs fine. But just for safety, before driving it off, I leave it for about 3 minutes or so at a standstill. That warms the baby up well and truly.
-Steve