My standard practice is to change oil and filter when I put it away for winter, and we're pretty lucky to have fairly mild weather mixed in during Nov-Mar, so we can move it a bit to keep the juices up and the flat spots off. It's stored in a fairly dark garage. Last week, I took the battery tender off, checked the dipstick and coolant (with a keyring flashlight), then put miles on both the car and my shoulders (think: "wax on - wax off"), and figured it was ready for anything. Until I stopped at a drive-in and someone asked to see under the hood. It was then that I realized that I had a LOT more work to do - that engine bay was embarrassingly filthy. Sigh - more elbow grease to be applied this weekend!
Good article...
I think you must be advocating changing before putting the vehicle away, and then again when taking it out in the spring (which if fine with me) - otherwise, you would be suggesting that one should put a car away for the winter with a belly full of dirty oil, with all sorts of nasty chemicals and yuck for the lower end mechanicals to soak in for 4 months?
Assuming that you either have one central oil fill spot (as on a straight 4 or 6 cylinder), or fillers on both valve covers (as on a V-6 or V-8), that would have some merit. For instance, on my V-8, the oil fill is on one side only, which would mean that head would get some oil - and probably some would make it to the cam - but the other side would still be dry. And that doesn't do anything for timing chain, distributer bushings, and a few other places, like crank bosses and bearings. At least 1/2 of your rod bearings are going to be above oil levels, so they are getting nothing. Additionally, if your car or engine is sitting on a backward slant, 1/2 quart may not even be enough to flood the places ahead of your filler (again, on my car, the fill hole is about 1/2 way back in the valve cover).
So while this would be "better-than-nothing", it's still not a great replacement for "oiling under pressure", which generally is going to require spinning the oil pump or otherwise moving oil through the engine using one of the other methods cited here. I wouldn't recommend just pouring some in the top end to be adequate for a motor that has sat dry for 3-4 months of winter storage. Couldn't hurt, but I doubt it'd do much to help either. Just my 2 cents-worth here...
OttoSkorzeny, can I please ask you to make your pitch to all of SoCal? 'Cause a ton of those folks from that particular sunny clime are moving up here to the freezing northland of Idaho every week, and helping to drive housing costs so high that the normal folks can't afford to live here. So if you'd please talk them into coming to Atlanta instead, a bunch of us natives would be very grateful. 😈