Here in Toronto, as in much of the mid and east of North America, 2013-14 has been a relatively cold winter (unlike our non-winter of 2011-12). This has been my second winter with my 2012 Volt (which I love) and it has performed very well, but I have a few observations and questions. My trips and commutes have been quite short which has caused me to burn more gasoline than I would care to. A few weeks ago when I started the car it said it needed to run the gas engine for about 10 minutes since the engine had not been in use much, which surprised me since the engine had been coming on regularly to make heat. So is this behaviour activated to thoroughly heat up the engine in order to "clean" it out? Another trick I learned here on this site is to put the climate control in "comfort" mode which usually prevents the gas engine from coming on again (after the initial start) in very cold weather. This has been a very valuable thing to know, thanks! I have also wondered about the relatively high fuel consumption to heat the car up and I was wondering if a more fuel efficient method might be possible? I know this is nit-picking, but I still wonder. Another thing I wonder about is Volt regenerative breaking in cold weather because it is said the Tesla S does not do so until the battery gets sufficiently warm. Also, what about hybrid cars such as the Prius, is regenerative breaking thwarted by very cold temperatures? In the Leaf?