That I wouldn't know, but it suffices to say that I've made just about 1,000 miles in one year (Jul 2022 - Jul 2023 to be precise), and then ca. 7,000 miles since then - and everything works like a clockwork, and AFAIK remains clean.
I probably should have mentioned that oil level remains unchanged between services (these are done by VOLVO dealers on an annual basis).
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