CM 871 oil Thermostat temp

[2dlb]

Sorry for the late reply. In the fall of 2023 oil analysis was showing an increase in iron. An inspection revealed the valve cam was failing, gear oil was added and the next 2 oil changes showed the deteriation was slowing, as the truck was on a seasonal contract we needed to get to christmas. We are in the process of installing a new cam from Cummins with all new wide based rocker arms. More to the point of the oil thermostat i appreciate the reply but at the risk of being criticized i have to ask WHY! The truck is a 2006 Pete with a 450 ISX CPL2732, 200,000on an inframe with all cummins parts liners at 14', engine was programmed by a highly respected member of the forum, emissions intact, RTO16915 trans which has .79 overdrive however when were loaded we can maintain our 95-100 km in direct down 1 gear and the motors runnin 15-1700 rpm with 3.73rears pulling 135,000lbs all day in hilly country. With 3 of these identical units they all run hot in the summer like 210-215 so my thought was if the oils running at a min 235 and we drop it to 215 with a cummins thermostat its still hot enough to vaporise any condensates in the oil which we run a kleenoil bypass to keep condensates out and try to hold the TAN in the oil down. At 250 degrees of oil were at the limit and we seam to be on the edge of having the oil breakdown. Could this be what has lead to the cam deteriation? We are and have been running Castrol Hypuron semi syn 15w40 with lots of various engines in the 25,000 hr range
Thanks for the advice