How long does synthetic oil last (time wise)?

There are lots of answers on here as far as mileage goes. I'm looking for a time frame though. I only put like 2,000 miles a year on one of my cars. Last year I changed it in the fall before putting the car into storage only to change it again in the spring. I started the car a few times, but never even drove it while it was stored for winter. Is this the way to go or would it be ok just to change it once a year?How long does synthetic oil last (time wise)?
Once a year is more than enough. Oil will last for many years if it sits. If you drive, it puts contaminates into it which can break it down. The whole thing about changing oil is overblown.

If you buy a new BMW, they warranty the car for 100,000mi and they only want to change the oil every 13,000mi.How long does synthetic oil last (time wise)?
Only in the fall and even then a full synthetic may not need changing annually unless most driving trips are less than 20 miles.



It helps to run the vehicle once a month in winter but, must be brought to operating temperature and allow to run for 10/15 min after.



Ideally - a garage kept above freezing is best. If the vehicle must be kept in an unheated detached garage it will be more prone to condensation buildup when warmed up at intervals.



Added benefit is to block the vehicle at each wheel. This would allow the engine, transmission,(seals), rack and pinion, CV joints, (if so equipped), differential and wheel bearing seals to be exercised to extend their life.
Change it every year like you're doing. Preferably before storage. Miles depends on which synthetic your referring to, for instance Mobile one has 5,000, 7500 mile blends, and a 10,000. mile pure synthetic. There are many others that claim 10,000. I would still change it a least once a year to protect you're investment.
This oil lasts 2-3x longer than regular. Mainly use a really good filter. 2k is very little wear in the oil boosters . In a warm climate there wont be moisture build up in the oil so you can use for maybe 3 years.