Has anyone used the Seafoam to clean out the lifters? As ive noticed, its kind of common for lifter noise on the 2nd Gen at high mileage. Although i do have the typical clatter, First thing in the morning ONLY when its cold and the truck is being driven (engine under pressure) It sounds like a really loud lifter. SO embarassing ive had to turn up the radio to tune it out. Especially having to pick up speed or getting up a steep hill first thing. Lasts for quite a few miles before it goes away when the truck is completely warmed up and been driven. Scares me because it sounds like something is broke, really bad. Other then that. it runs smooth and no noises otherwise. 112k miles on the 2007.