Ergo is you change oil before storage in winter, there is no reason to change it again when it comes spring driving time. I think that issue was at the heart of this thread, so I wasn’t picking your thread apart. I am just trying to cut through the mysticism and find out if oil goes bad sitting over a winter. On the two counts you and I have discussed, I’d say it does not. Say, this list still has some life in it! This discussion takes me back 20 years. Jim On Sun, Oct 10, 2021 at 9:48 PM Geoffrey Toye <geoffreytoye@gmail.com> wrote: > Yes, if you change the oil before storage then there will be no blowby gas > during storage. If you don't, then the old oil will have seen lots of > blowby gas before storage. > > Yes, oil cans don't have an expiration date. The antioxidants are consumed > by an operating engine. > > On Sun, Oct 10, 2021 at 5:43 PM Jim Felder <jim.felder@gmail.com> wrote: > >> >> >> Sent from my iPhone >> >> > In response to David’s welcome and detailed analysis of acidity, water >> gets >> > into the oil system by way of the blow by gasses that pass the piston >> rings. >> >> So, if the car isn’t being driven during storage there can be no blowby. >> Hence no water in the oil. So scratch that reason, right? >> > >> > Oil contains anti oxidants that are life limited. Old oil cannot protect >> > your engine. >> >> I have never seen an expiration date on a can of oil. So scratch that >> reason as well. >> >> I could be wrong of course but I can’t see these so-called threats being >> realized. >> >> Jim >> > >> >>> >> >> >> > |
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