Depends on where you live, what you drive it in and how often you clean it. If I drove my car year round in NJ and didn't take it through a full underbody car wash every 2 or 3 days in the winter it'd rust real fast.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.