So the question is, is an oil change before winter storage actually necessary? Or is it another "recommended" thing to do by the oil companys as a way to sell more oil? The reason I ask, I run Mobil 1 with the mobil 1 filter and I have about 2000 on my current change. The car will probably be ready to go to winter storage next weekend and I hate to dump perfectly good oil down the drain for no good reason. I'm wondering if I really need to do it, or if its another gimmick by the oil companys to sell oil. For those that say I do need to do it, do you have a reason why?