I have a '99 F150 with the 4.6 V8. Currently pushing over 157,000 miles. This is my second F150 - the previous being a '97 F150 that sold with 163,000 on the odometer. Both have always had a bit of a clatter for the first second or two at startup, regardless of oil or filter combination. The most noticeble reduction I ever had was switching from quickie lube filters to quality filters (motorcraft/wix/purolators). Didn't eliminate noise, but reduced it. Regardless, most of our fleet at work sounds about the same, and there haven't been longetivity/reliability issues.
Also, others may remember, but I ran a whole series of 1 year long runs on 5w20, 5w30, and 5w40 oils. All worked fine, UOA's showed very slightly better wear on 5w40, but not enough to argue that is was out of statisitcal noise. I got hit with a nearly 7% reduction in fuel mileage running 5w40.
Utlimately, I've settled on 5w30 (slightly less volitility/makeup oil than 5w20) and Wix (Napa) filters.