[benamin]

Just to add my piece. I haven't bothered lately plugging in my car but it was -42 the other day with wind chill and it fired right up as usual. One difference however is I have synthetic oil in mine which significantly enhances cold starts ( I mean significantly cold). I think it's a Canadian thing but the mine (3.6r) was shipped with synethetic due to the regular cold winter.

 

[benamin]

I wondered if the factory break in oil has anything to do with it. By the time I'm ready for my first oil change, the weather will be warmer and the battery will be totally fine. If the battery feels weak next winter, though, I'll swap it out for something better.

I haven't hit my first oil change yet either.