Do you winterize your vehicle or just let it be?

  I live in Southern California, so I can just


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It doesn't get cold enough here for that. :)

Winters here aren't severe (temperature wise), so there's no need for me to winterize my truck.

I live in Sun City, AZ.

I summerize it.  I try and park in the shade whenever there is any.

I don't change any fluids to accommodate the changes in temperature.  We are seldom cold enough in North Texas to need to do anything out of the ordinary....

I used to have an outlet in the garage controlled by a timer with a ceramic disc heater plugged in to heat the interior of the car if it were predicted to be incredibly cold on a given morning.

I've never even heard of that. 

i dont have a car but if i did i would winterize it