Love him or hate him, LSJr has posted a video on surface finish design for cylinders, and rings to match the different finishes. For clickbait, he briefly mentions the L87 recall, but the focus is on cylinders and rings. He's at Jon Kasse Racing Engines with Dr Mark Malburg who he refers to as "a surface finish guru". Malburg has measured surfaces and created large-scale, 3D-printed models of some surfaces. Pretty good discussion and visuals.
Lake points out that consumers should do three things: Use a metallic drain plug, cut open and inspect their used oil filters, and UOA for trend analysis.
Lake points out that consumers should do three things: Use a metallic drain plug, cut open and inspect their used oil filters, and UOA for trend analysis.