The breaking plugs issue was only on the 3v 5.4's from 04-early 08. from mid 08-on ford redesigned the heads and plugs therefor solving the issue.My 5.4 has 231000 miles on it and its probably about due new plugs. I know I havent changed them since I had the truck. Except for 1 lol. It got changed a while back when I dropped a coil pack. Which by the way I'm still on 5 of my original coil packs. Dont know if thats something to brag about or if I need to change them asap. I figure just run them until they go out and soon I should have all new ones.