I remember reading about this theory years ago, in fact I’ll go so far to blame this theory on my rings getting coked up and me having to trade in my car way before I anticipated. Remember many people saying things like...your oil life monitor and manufacturer know more than you. Then five years later those same manufacturers that “knew more than everyone”, reduced their oil life monitor mileage length. And those same manufacturers that suggested 20,000 mile, 15,000 mile, oil changes, reduced them. That did happen, right? GM, VW, others. I’m not imagining that am I? I’m serious, I know GM reduced theirs and maybe VW, but there were others, right? BMW I believe? After their dealerships were filled with engines needing replacing?
Now the latest is Toyota. Their 10,000 mile oil changes that I believe are only suggested here in the US? I could be wrong about that. But there are now Toyota techs on YouTube telling you...please, please don’t do the 10,000 mile oil changes - stick to 5,000, you’ll never have a problem, maybe 6,000, but the 10,000 mile oil changes will give you trouble when you start getting up into the 100,000-120,000 mileage mark. There are techs saying that now. Oil consumption, replacing rings, replacing pistons. Just change it at 5,000 miles because most of us are in the “severe” use category and we don’t even realize it.
Now I could be wrong about all of this^^, but even still, I don’t buy that more frequent oil changes are worse on your engine than longer intervals. You want to tell me that longer intervals save the environment, save money and shorter ones are not needed? Ok, fine, but don’t tell me they’re better than short intervals. Lol.