Re: 5.4 L Ford engine
If the rig you are looking at is a 2005, you don't have the sparkplug thread problem, that was fixed years ago. I have a 2002 with the 5.4 engine and it just turned 112,000 miles. Still uses no oil between changes (every 3,000 miles) and I use Castrol 10-30 in it. It just passed its 2 year smog test with flying colors. I do the normal maintenance on it, nothing special, just the fluids, filters, spark plugs. You might do a Carfax to ensure that the mileage shown is correct but other than that, you probably should have a decent rig.