04 5.4 F150 w 174K so far....
I just put 1000 miles on it last weekend driving to Baton Rouge and back to Fort Worth. Original plugs, original belts and hoses. Truck still runs like a top. It's had 0W-20 Mobil 1 all it's life and a fresh dose every 5000.
It runs perfect now but I am worried about the plug situation. I know they need to be changed and (so I have heard) have the coils replaced. I typically do all my own service but the coils have me worried.
Great site by the way....
Russ Rogers