My range is currently down to 37-39 miles now. Even if i do not use the heat, it does not go much higher, maybe 40 miles on a good day. The worst part of winter driving is when the temperature drops to mid 20’s, the gas engine turns on for a few minutes every 10 minutes or so. I think the 2013’s have an override or a 10 degree lower threshold. I am not sure why it does this, but I would rather go through the battery charge before having the gas engine turn on.
I still have the original gas from the dealer 4.5 months ago, but I think I will have to fill up before the end of this winter with this motor turning itself on. Still, not bad going half a year without filling up.
I will do a followup when temps get down under 0 degrees Fahrenheit.
2/28/2013 Update: Looks like sub zero temps are not possible this year, but we did get weather in the teens. I have been able to get 37-39 mile range pretty easily, and low 40’s average if I try hard.