Assuming the oil has some miles on it,
I would think changing it in the fall before laying it up makes more sense. New,clean oil without contaminents would seem to make more sense for long term storage.
I'm sure there are others on the board with specific knowledge, but IIRC, the main culpert is acid in the higher mileage oil with can work on bearings, etc..
I'll yield to my learned colleges...
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2013 Boxster S
2006 Boxster--sold
1999 Boxster--sold
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