Yes, both all of my UOA results are on dino oils.
That being said, on my F150's the previous dino was mostly a group II/group III blend also (a "synthetic" blend), with similar detergent packages (on the basis on UOA).
Is the quality of the base oil required or not? On the basis above, it doesn't appear to be the case.
I was wondering if anyone else would pick up on the Ford modular V8's and the V10 also using 5w20. In my F150, I pull maybe 1500 rpms @ 55mph and pull 2000 rpms at 70 mph. Not exactly a high reving application, and the motor doesn't see much time over 3000 rpms.
I will grant these applications are more rev-happy than V8's of old, but i wouldn't broad brush things saying that a 5w20 can' survive a low reving application, where they are clearly doing well in the Ford pickups.