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It's nice to see youtubers testing automotive conventional wisdom.

In https://www.youtube.com/watch?app=desktop&v=T-yt5a1cWd4, Project Farm tests the standard advice that you need to change your oil annually regardless of mileage.

The reasoning people used to justify this (oil oxidizes, blah blah blah) never made sense to me since the time-based wear interacts with mileage-based wear, so if the oil is good at 1y & 10k mi, it must have margin left at 1y with, e.g., 4k mi, so I've always stretched out my oil changes.