Am I understanding you correctly? Your cu went from 13 to 248 and lead from 7 to 20 and Your analysis guy isn't concerned? I have difficulty in believing its bearing material if your using Amzoil. Might be from cooler, but why?
I just checked my last numbers and cu was 5 and lead was 8. If you're starting to deteriorate the bearings you should start seeing a drop in oil pressure. Just changing filters a couple of times won't be the answer, unless some particle broke off inside the engine and did just a little damage and is now down at the bottom of the pan. Man I just don't know. I'm sure your going to watch everything closely now. Keep us informed.
02 2500HD LT D/A SB CC 4X4 BLACK, Westin stainless nerf bars, BW GN Hitch,Racor 60S post oem fuel filter, Oil Guard bypass engine oil Filter. All synthetic fluids. Kennedy boost valve, edge, Modified air intake,EGT & Boost digital gauge,TransferFlow combo fuel & tool box, Air Lift Suspesion Bags Rear & compressor with remote, Bilsteins front & rear, Frontier front replacement bumper.