I will be getting VOA on 5w20 Texaco Havoline from ChevronTexaco in the next week or so (unless someone beats me to it). It's what I put in my '99 F150. I now have 5w20 in both my F150's - Conoco Hydroclear 5w20 in one (Same as motorcraft) and Texaco Havoline 5w20 in the other.
How the 5w20 will compare to the other grades is not a straightforward deal thoug, considering the more restrictive testing the 5w20 must pass.