I'd always change the oil every 12 months .. oil is not something that stays clean and stable, it soon gets full of contaminants ... I was always told that used oil just sitting there for long periods of time wasn't good, from moisture buildup to acidic properties.
even a quick search on the web explains this
https://rennlist.com/forums/996-for...after-one-year-regardless-of-low-mileage.html
https://www.honestjohn.co.uk/faq/importance-of-clean-oil/
even a quick search on the web explains this
https://rennlist.com/forums/996-for...after-one-year-regardless-of-low-mileage.html
https://www.honestjohn.co.uk/faq/importance-of-clean-oil/