It occurs to me that my earlier message may have been somewhat misunderstood. Just in case, cleaning out accumulated sludge before putting an engine into service should be done regardless of oil choice. Even a "non-detergent" oil can dislodge "chunks" due to oil flow.
Also, we are all capable of learning things correctly about outcomes, even though we may not fully understand the technical causes. For the word mavens in addition to Henry (I know you're out there
) it's called learning empirically. Unfortunately we may assume causes that are either incomplete or wrong, even though our remediation is appropriate. There have been several other notions tossed out in the flow of conversation here that are full of stories/reasons/myths. But enough of that.
Ol' Henry.............trained as a lawyer? Considered politics, however briefly? AND from Utah?