People, this is not a worn out oil question it is a winterizing - lay
up question.

Why do we change the oil (gear or crankcase) for lay up? It is not
because the oil is worn out, it is to get fresh oil in there before
the lay up. Why fresh oil rather than oil that has been sitting in
there for a while (used or unused)? Because we don't want any
moisture in there as the engine sits all winter (or for several
years). If you change the oil, you also drain out any condensed
moisture that is in there, and replace it with moisture free oil.

That condensation/moisture issue is not based on how many hours of
use, but how long the oil's been in there and under what conditions.

It is more important to change oil before the lay up than after. If
you put new lube in there for lay up, you really don't have to change
it in the spring or whenever it's been put back into service.

Why the HECK anyone would avoid the trivial expense and effort of
changing lubricants before a lay up just doesn't make any sense.