Had a 1999 Grand Marquis [with the HPP package], 2005 Crown Vic and a 88 Town Car [5.0]. At one time my entire family had 4.6 Panthers. We all had long commutes to work from Queens NY. No major issues with any of them. We all got over 250K miles on all of them. No issues with A/C/Heat in any of them and we left the climate control system on all the time. We just set it and forget it. They ALL were super low maintenace. Just plain basic maintenance. Nothing more.Still. Ford 4.6 was a terrible passenger car engine.
But you go ahead and rock your Grand Marquis that does 0-60 in 10 seconds, averages 18 mpg, eats intake manifolds and timing sets, has the back seat of a Corolla, and blows hot or cold air however and whenever it feels like it.
If Ford still made the 4.6 Panther I would have a Town Car.