Have a 2002 Forester that's parked outside in temps ranging from -20 F in winter to 105 F in Summer.  I've had a lot of challenges with this car, but it keeps running.

I got the car in California new.  The manual is different than the one the dealership showed me up here.  We brought the manuals out to settle a disagreement.  We both won.

 

 

Welcome aboard!

 

Do you use an engine heater when it gets that cold?

 

When I lived in Indiana, I used the ones that went inline in the lower radiator hose.

 

They would always start without it in sub-zero temps, I just liked to have heat when I first got in! 

I never tried an inline heater.  I use a block heater and it generally will start the car easily down to -10 F.  Lower than that, I need to plug in a battery warmer as well.

 

I've noticed that as the car gets older, it needs more help in the winters.