We use the (inboard) engine so rarely on my sailboat I'm sure we've gone 2 years on a tank without issue before.

Amuses me hear this - I ran a moped from a large tank of multi-year old petrol, and it got by fine. But maybe a modern car might be more picky?

HN is full of maintenance purists, and I do know I should do better, but... A Corolla will work fine after sitting for a year or so and it’s once-or-twice-per-decade oil change seems to work ok.