 Has the worst engine Ford has ever manufactured. You will only get past 150k miles if you are extremely lucky. Mine has 130k miles, new engine just done, rear end is going out, rear power slider leaks and needs replaced, and transmission shifts erratically some times.  Took it into Ford dealership when I was having trouble with the engine and they said thats just how fords run and drive. Well 2 weeks later threw a rocker arm and destroyed cam and bent valve. Please do your research and never buy a Ford with a 5.4l engine it not worth the risk unless you get one that has a re-engineered reman engine in it that addresses all the flaws.