I've run 2 used oil analysis on my 01 Escape with a V6 using 5W20 oil. One last year at 10K miles with Motorcraft after 3,200 miles of use, and the lastest this month at 20K miles with Castrol GTX after 3,150 miles of use. The first number is Motorcraft, the 2nd Castrol.

Motorcraft/Castrol
aluminum 3/3
chromium 1/0
iron 12/9
copper 8/5
lead 1/0
tin 0/0
molybdenum 4/110
nickel 0/1
managanese 0/1
silver 0/0
titanium 0/0
potassium 1/1
boron 30/4
silicon 22/17
sodium 3/3
calcium 1064/2472
magnesium 436/5
phosphorus 643/804
zinc 760/925
barium 0/0

SUS Viscosity 51.9/53.5

All in all, I was more pleased with the Castrol than the Motorcraft. It had slightly better wear metal results and did not shear back as much. The Motorcraft had probably 40% city driving on it, while the Castrol reversed with about 80% city driving. But considering how much both oils sheared back to the bottom of the viscosity range, I sure wouldn't use them any longer than I did, not in this engine at least.

I'm running Mobil 1 0W20 in the Escape now. So my search for the Holly Grail of oil goes on........