This is the factory fill Freightliner coolant using Penray technology. When I filled out the form for submitting the coolant sample for analysis, I picked Cat Diesel Engine Antifreeze and Coolant as the closest equivalent and perhaps that was an error and an explanation for the low nitrite. Perhaps Penray uses lower nitrite than Cat DEAC.
I changed out the coolant after this analysis. I used Detroit Diesel PowerCool Plus.
I am not sure why the PH is low. This engine does idle a lot and perhaps that is the cause.
I did not use a cleaner. I drained the original coolant, filled up twice with distilled water and drained and then filled up with PowerCool Plus and distilled water.