OVERKILL
$100 Site Donor 2021
Originally Posted By: coachditka
Look at my PU UOA and see for yourself. The last 2 are PU and the others are M1. PU worked better for me, but every engine is different.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2023797#Post2023797
With the seemingly linear increase in silicon, as well as the slightly elevated lead, I'd be more concerned about your air filtration than the couple ppm iron variations between your M1 and PU runs.
Why no TBN on your M1 runs?
Those kind of numbers (Aluminum, Copper..etc are the same, only iron is really different, and by only a few ppm), I'd say both oils were performing admirably.
Remember, UOA's are NOT meant to compare oils. Big article on the subject on the front page of BITOG in case you missed it.
They are meant to monitor oil life, contamination and potential component failures. In your case, the elevated silicon is a perfect example of this: It often means you've got something going on with your air filtration.
Look at my PU UOA and see for yourself. The last 2 are PU and the others are M1. PU worked better for me, but every engine is different.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2023797#Post2023797
With the seemingly linear increase in silicon, as well as the slightly elevated lead, I'd be more concerned about your air filtration than the couple ppm iron variations between your M1 and PU runs.
Why no TBN on your M1 runs?
Those kind of numbers (Aluminum, Copper..etc are the same, only iron is really different, and by only a few ppm), I'd say both oils were performing admirably.
Remember, UOA's are NOT meant to compare oils. Big article on the subject on the front page of BITOG in case you missed it.
They are meant to monitor oil life, contamination and potential component failures. In your case, the elevated silicon is a perfect example of this: It often means you've got something going on with your air filtration.