CM871 Oil sample help

[MSPOIRIER]

Well still no conclusive answers yet but due to having a baby last week we outsourced this one to Navistar while we were in the hospital. They pulled the oil pan, pulled main and rod caps as well as inspected the cylinder liners and wrist pins with a scope and said that actually everything looked like it was almost brand new. From the hashing in the cylinder liners to the bearings. They reviewed the samples with me and spent a couple more hours investigating and said the only possibility they can come up with is some thing failed at some point and somebody previously replaced parts and Maybe the iron has not worked out yet. We also replaced the gear fuel pump due to a slight seeping leak but they said everything else looks really good and mechanically in very good shape. I will continue to sample and change oil and filters around the 4k mile mark to make sure the iron is continuing to decrease. Is there any other checks or suggestions anyone can think of? Thanks for your help

Sam