no way to use the Karma in Winter here - I even did not bother to buy Winter tires...
I am using a proper BMW 530xd in Winter - that gets you up to any skiing resort :-
I might keep the record on fuel consumption though: my car shows 172km/l since ever - I think I filled the tank 4 or 5 times. As my office is 32km from home, the car goes purely on electricity and I charge it overnight..
Sometimes the motor starts (either to charge the 12 v system or to put some oil into the engine, who knows...) - maybe I can overcome that by putting the car on a trickle charger from time to time