I've skipped 2 oil changes on my 03' Crown Vic and oil that came out was still somewhat clean. It wasn't a black gooey mess that you would expect from a 4 or a 6 banger. If I had a Crown Vic beater that I didn't give a shit about I wouldn't hesitate to skip 10 oil changes. As long as it's topped up the 4.6 will take a… » 9/29/14 3:21pm Yesterday 3:21pm