Guess I was lucky. I owned both a Crown Vic and Grand Marquis and drove them both close to 200K with minimal maintenance. I did go through a couple of starters due to them hanging down where they got sluiced with salty slush all winter long. My local greasy garage guy put together a long string of extensions and joints to get that third bolt out. When I sold them they were both running well and would serve the next owners well. I find here in the great NE you get about 15-20 years and 200K miles before rust becomes an endless problem. Sold the GM with a small rust leak in the oil pan, which I told the buyer about.