[Semi-Poor]

IMHO if the weather is so cold you can't wash the car yourself, you are better off leaving it dirty than subjecting it to mechanical car wash. I never run my car through a car wash under any circumstances. Better to leave it outside in the cold, the salt is inert when frozen, when you put the car in a heated garage everything melts. If you must, go to a spray booth rinse car and drive it dry. Winter sucks and it is hard on cars I try to inflict the least damage possible. Hope this helps.