Hmm...I had heard that, 15+ years ago that FORD's std. is 3000 hrs for major component/materials failure...the others (GMC..etc.) were 5000 hrs. :/
I have a 94 Lincoln Town Car. It is essentially the same car as a Ford Crown Vic.
It has 194K miles on it and it has not had a major failure.
It uses a quart of oil to 4500 miles. Not bad.
It runs and drives like new.
Taxi companies buy old cop cars and run them as taxis.
They routinely run them to 400K miles without replacing the engine.