Oil Oxidation

[bluemaruder001]

Hello All,

I have a 2001 F 250 PSD 7.3 with 217K miles. I run Amsoil 15W 40 HD diesel with a 2 filter bypass system. I routinely pull oil samples and have analyzed. I recently pulled a sample with 4K miles and when I received results back, it showed high oxidation but everything else was within norms. I do not have an oil temp guage yet. I have noticed that the factory oil pressure guage is running a bit higher than I am used to seeing. Everything else is normal, EGT Trans temp, water temp and appears to be running fine. I was told by Oil Analyzers that oxidation comes from high temps. Unless I am mistaking hot oil would cause a lower oil pressure. Engine is pretty much stock. Banks Exhaust, Big Head and compressor wheel. HPX and FRx and Ford AIS intake.

Anyone experienced something like this?


Thanks!!

[Turbostang500]

Never experienced it at least that I know of.

Something that could be causing it, not idling long enough for the turbo to cool down some. If you shut down while it is still roasting, it will burn the oil inside it. Do it enough times and it might start to show on a report.

Just a guess for the conversation.

[bluemaruder001]

I always let turbo cool down before shutting down. I was thinking possible oil cooler issue, not loosing any oil into coolant or the other way around.