I know, but seeing as its a Ford ad, wouldn't Ford be wanting to also take the opportunity to show off its new Crown Vics, rather than old rusty ones?
Here in Australia it is unusual to see any police, taxi etc. vehicle older than 5 years. They quickly retire them from service once they reach a certain age/mileage and thats usually about 4-6 years. A '97 Crown Vic (or earlier) would now be well over 8 years old.