carbon

Did an oil change last night and cut open the filter after work today. I noticed these small pieces of carbon scattered around inside the filter housing and filter. Oil that was drained was Amsoil SS 5w20 and oil that went in was the same. Is this evidence of cleaning prior deposits?

This is my first GDI engine. I always do my own oil changes. I have read fuel dilution and carbon/soot are major issues with GDI engines. Should I always expect the oil to come out pitch black and smelling of fuel or ? What has been your experiences?

A story about a neglected engine and how it, thus far, has survived. Mostly by dead reckoning and good fortune, less so with measurable science. Am sure some will crow, but hopefully some constructive ideas will be shared to help others in similar situations. In Feb 2021, an acquaintance was...