M1 0W40, 10.8K miles, elevated Fe and Cu

[Hokiefyd]

Thanks for re-posting the image. The phosphorous and zinc look low on the M1 5W-20 sample. Less than 550 ppm for both?

Regardless, I'd stick with what works. For your engine, it looks like the 5W-20 grade is a great match.

 

[Astro14]

Originally Posted By: LeakySeals
I can't count how many times Blackstone UOA's showing M1 with elevated fe has been discussed. Are people seeing this with M1 and other companies that provide UOA's?


No.

Sorry to resurrect this thread, but that's why I posted a 9,000 mile run on M1 0W40. Almost no Fe in that sample.