Yup. Which is why I sell my fork at years end with fresh oil in it so the buyer doesn't hate me.bizutch i think that you forget the oil degrades with time and needs to be replaced occasionally (like every year or so). the same goes for brakes and most any product that requires oil to work properly.
One single oil change after initial break in will typically do you for 1 full season of riding as it gets all the tiny little metal shavings out of the system.