[Porsche-O-Phile]

To expand on what teenerted1 said, do NOT drive any car you care about in the winter. I have a standing rule that has been in effect since I moved to this area of the country (which does use salt in the winter months) that I DO NOT DRIVE the Mercedes or the 911 from the first snowfall until we've gotten 3-4 good, solid, heavy rains in the spring to wash all that crap off the roads completely.

It has worked wonders - not a speck of rust on either. Get a throwaway POS winter beater for the crummy months that you don't care about. Drive the crap out of it and if it dies/rusts out, chuck it and get another for $500. Way cheaper long-term than body repairs or having to replace a vehicle you actually care about.