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Thanks for this information, based on actual engineering experience in the QC domain. I personally agree that Toyota would prefer to keep its excellent reputation for quality and value, rather than become known as the car company who hands out free engine replacements. Dr. MThis glitter is only a concern if 1) you don't have a filter and 2) it is an abnormally large amount. If the latter, no level of oil changing is going to fix it because the engine is already eating the bearing and you'll be getting a new engine courtesy of Toyota's warranty department.
I was a Quality Engineer for an engine line in a past life. I've pulled the drain plugs off dozens of engines right off the end of the line and they all have this. It is totally normal. The little bits of metal from the run-in of the engine have to go somewhere. There's a strainer and a filter in the system to prevent those bits from getting to places where they actually could be dangerous.
It is also totally wild to me that people would give a car company $70k for a vehicle and not trust them to set the oil change intervals. Quality doesn't happen by accident. These OCIs are studied and confirmed and studied again. The engines are designed from the outset for these intervals which impacts sump size, how the oil is used (lubrication, actuation of VVTi, cooling, etc). If you meet specific conditions, they recommend shorter intervals because they've studied those specific conditions, too.
ThanksMAC25LC, Welcome to the Jungle!
Oil filter part#: 90915-YZZN1
It is 0w20 full syn