I have a '99 Windstar LX with 111K mi's, all MN miles, car owned since new. There is virtually no rust on the engine sub-frame, which I just checked based on this thread. I do have rust rot on the rear left rocker panel and the front right rocker panel, even though the dealer did the underbody and special treatment. Unfortunately the extended rust-through was through a Duraguard dealer who is now out of business, so I don't think FORD will stand behind the rust through. | 
