Even more reason not to change it, unless you were attempting a land speed record.
My oil was changed on returning from Italy October last year, that was a 4500 mile two up jolly jaunt. I've done very little this year, I'm guessing, but probably around 1500 miles on semi synthetic. It won't be changed before next spring at the earliest, it still looks as clean as new.
I really don't prescribe to the cheap insurance rhetoric. Firstly it isn't cheap and secondly if you do prescribe to this mantra then wouldn't you change it every month........just in case?
Edit.....when I dropped the oil from the trip that also appeared very clear and clean, that and this fill are 5100.