Mine does not like the single digit temperatures either. I usually have to glow it 3-4 time before starting. Plugged in is a different story.

I have been contemplating an idea for an auxiliary deep cycle battery with disconnect, and a 1500w inverter on a timer, all in the trunk, so I could plug it in when there is no outlet available.

The disconnect would allow the battery to charge when running but separate the two when not running, similar to a boat's house battery bank. what do you think? (I know the purists would not approve, but it is a pain when it's real cold with no outlets)