2024 6.7 used oil analysis - high iron, copper, and potassium - worse than first two uoa’s

[24Megacab]

Looking for thoughts/opinions regarding this UOA. This is the third UOA I’ve done on the truck since new. I’ve changed the oil at 3k, 9k, and 16k miles. I was hoping to see potassium starting to trend down, but that is not the case. Also, iron is now 118 and was previously 47. Copper went from 31 to 90. I have not used any fuel additives; however, I did use Power Service Extreme Diesel, which is a collaboration with some fuel stations; in this case, it was a Sinclair station. I quit using it and went back to primarily Marathon Diesel as I noted more frequent regens using the other fuel (coincidence? maybe, but I quit using it last time because of the same issue). Prior to this oil change, I noticed an erratic tick on the passenger side of the engine; I don’t think it’s lifters as it’s erratic and sounds more like a manifold leak, but it’s not. Diesel tech said normal EGR function when I took it in. This truck is daily driven and sees a mix of highway and stop-and-go. I don’t have any frequent regens issues, and it sees enough highway to passively regen. This oil was run all winter in -8F temps, so there may have been slightly more idle time than summer; but nothing excessive. I can post previous UOAs if anyone would like to see/compare

 

[56ram2500]

Have you used the same oil brand for all 3 oil changes? I went from one brand to another I saw higher copper for the one oil change, it was then lower the next one, in my case copper was up at 218 then dropped to 43 on the next oil sample, then down to 18 on 3rd UOA...

 

[24Megacab]

Have you used the same oil brand for all 3 oil changes? I went from one brand to another I saw higher copper for the one oil change, it was then lower the next one, in my case copper was up at 218 then dropped to 43 on the next oil sample, then down to 18 on 3rd UOA...

No, I changed brands. I used VPBE the first change, then Mobil Delvac ESP 5w40 for the second. The most recent change I used Chevron Delo XSP 5w40. This is useful info for explaining the possible copper spike. What I don’t understand is that iron is 3x what it was prior to this at approximately the same OCI length. Also, the potassium is increasing instead of decreasing. Thanks for the input, I appreciate it.

 

[Brad460]

What is the baseline oil analysis on all these oils? Meaning, you should have an oil analysis of the oil new to compare…otherwise how do you know what is or isn’t changing?

 

[24Megacab]

What is the baseline oil analysis on all these oils? Meaning, you should have an oil analysis of the oil new to compare…otherwise how do you know what is or isn’t changing?

You mean virgin oil analysis (VOA)? I do have baseline VOAs for the oil. No oil has iron, copper, and potassium at levels anywhere near this. The VOA is totally irrelevant to this.