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The results for the first few oil services is great info to see the health of engine and see the initial wear go down. It shows initial wear got over soon too. The silicon which is usually particles of dust/sand too small for air cleaner to catch was high in the first two drains at 5 and 435 and that probably is cylinder coating polishing off though some machining abrasives use silicon content. The 5 mile drain doesn't show high zinc. Zinc was, and still is in some cases, the metal additive used to address metal on metal contact where oil flow is not a cushion, camshaft lobes against a flat tappet face being the worst offender usually but rings on cylinder wall is another area. The break-in oil for S65 doesn't look special from the report, even viscosity doesn't show as lower. I would think M engines going back 20 or more years got motored over on a testing stand for analysis. On those stands an engine with external oil cooling can be pre-oiled before rotation starts. Water-to-oil cooler equipped lose that option but still get oil pressure verified with number of rotations charted. Some engines get 100% checked with some getting fueled and running. Just running them over gets verification of compression and sonic check for loose stuff is a fail.
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