Originally Posted by wwillson
Originally Posted by WobblyElvis
Looks like there is some carbon in them there pleats. Mostly near the end caps. Is this engine burning any oil?
I looked at the filter media again this morning with about 10x magnification and yes, the black color is tiny black carbon particles. Now I'm wondering if the Delo 5w30 I ran has good cleaning properties, or maybe the carbon is from agglomeration because I ran the oil for a year, including our cold winter here, or both?
Small carbon particles are probably caused by fuel rich blow-by past the rings. I would always see more carbon particles in the filters I've cut open when the oil and filter were ran over the cold winter months where there would be richer cold starts. And yes, a few small metal particles in the filter are typically normal, seen the same thing. Thanks for the C&P Wayne.