[Christien]

Lots of people will probably disagree with me, but I don't do too much to winterize my 911, and our winters are pretty brutal here (lots of time around -20C). Full tank of gas, Stabil in the gas tank, a couple dryer sheets on the floor, windows cracked just a tiny bit (to allow air to circulate, but prevent mice from getting in), close the heater flappers and maybe some mice traps on the floor, though I think I've only done that once and never had a mouse problem, even with the carbs off and the intakes just covered by a sheet. I usually lay out a tarp over the concrete floor and park the car on that, to prevent moisture coming up and oil dripping on the concrete.

Usually my car is stored in a garage attached to the house which keeps it well above the outside temperature (though still below freezing). I have yet to find a feasible heating method to keep things just above freezing, without installing a furnace of some sort. You could put an electric space heater in there, but that will be ridiculously expensive over the winter - it would probably be cheaper to pay for heated storage!

As for flat spotting, I never move the car during the winter, and I've never had a problem with flat spotting. Last winter I did put a few extra PSI in there just to be safe. I really disagree with the idea of raising the car over the winter because of what it might do to the suspension - shocks are meant to remain in a compressed state, and I don't imagine spending 4 months expanded would be good for them. I'd rather take my chances with flat spotting the tires.

Throw a cover over her and raise a glass to 4 months of misery...

(yes, I hate winter)

Hope this helps!