Years ago I went shopping for a used vehicle for commuting, something in the 100,000 mile range. All the small trucks with that kind of mileage were completely worn out. I came upon a Crown Vic with 107,000 miles. It drove like a brand new car and its 5L V8 got 30MPG -- more than the small trucks. I put on another 150,000 miles before selling it.
Crown Vic's and Grand Marquis are the best.
One of the best cars ever made along with the somilar marquis. Weak link is the eatc but i know how to fix that now.