Thanks for the input.
SJPONY -- While Ford is advertising a 10k oil change interval, the manual says to change it when the oil life indicator says so, or 10k miles, whichever comes first. My oil change indicator is working on a 5000 interval, so that's what I am doing.
I did change it at 1200 miles just to be cautious, with the expectation of changing it again at 5000 and then going on 5000 mile intervals from there on out. Because of my schedule, it actually got changed this time at 4600+ or so. I knew I'd be busy the next week, and the Ford engineer made it clear that I could change it on my interval (after the additive was put in), and the tick would still be gone. Wrong-o.
F91 -- I wasn't trying to disrespect you or Ben, just pointing out the inaccuracies in his post. I haven't used anything but the 5w-20 because I don't want Ford to blame me for the problems. As for voiding the warranty, they would have to prove using the different weight is what caused the problem, but I don't want to wage that war.
Alticavis -- I hear you. But, in this case, it is obvious Ford is not trying to find the real fix, just swinging wildly in the dark in hopes of keeping their repair costs down. I'm a capitalist, so I understand what they are thinking . . . it's cheaper to risk lawsuits and consumer complaints then to fix these the right way.