I would probably change out the oil at once a year intervals.
I have a car I store for a few months at a time and one thing I do is to disable the ignition and turn the engine over till I get the oil pressure light go off. The oil does drain down and I did notice that when I changed the oil filter (and oil) when it had sat that the oil filter was completely empty of oil.
Unfortunately I have to change my oil every six months even if I don't drive the car to comply with the warranty.