JF,, Why were You sitting in a shop for many years ~~

> On 8 Oct , 2021, at 6:06 PM, Jim. Felder <jim.felder@GMAIL.COM> wrote:
>
> I don't know. i've opened up engines after sitting in a shop for many many
> years and have never seen water (or any other) contamination at least that
> was visible. My Jettas were "never" (my quotes because no VW ever held oil
> for that long)  supposed to undergo transmission oil or transmission fluid
> changes.
>
> The reason I would change oil in an engine is if I did not know what I was
> working with, no matter what the circumstances.
>
> Does anyone know for sure about oil being hygroscopic? About it turning
> acidic? And I am talking about for certain, as in information from a
> chemist.
>
> Jim
>
> On Fri, Oct 8, 2021 at 11:31 AM Dan N <dn92610@gmail.com> wrote:
>
>> I agree.. some people change the oil twice... once before storage and once
>> after storage... Car collectors do it on a strict time schedule because of
>> the contamination factors... storage or not driving it or not.
>>
>> On Fri, Oct 8, 2021 at 9:22 AM Cary Chiang <ccchiang1@gmail.com> wrote:
>>
>>> I've read a few articles about how professionals and car collectors
>>> prepare vehicles for long term storage, and their rule was to always
>>> replace fuel and oil with fresh/clean fluids before storage. I believe
>> they
>>> stated that the contaminants in used oil, combined with the moisture from
>>> combustion and from the humidity that Dan mentioned, causes the oil to
>>> become slightly acidic.  No need to leave that sitting in your engine all
>>> winter!
>>> Cary
>>>
>>> On Fri, Oct 8, 2021, 10:30 AM Dan N <dn92610@gmail.com> wrote:
>>>
>>>> I'd think wait till the Spring and change oil before you resume the
>>>> driving. Fresh oil sitting in the engine during the winter months will
>>>> collect moisture due to humidity.
>>>>
>>>> On Fri, Oct 8, 2021 at 7:22 AM Jack R <jack007@comcast.net> wrote:
>>>>
>>>>> Any advise on timing of an oil change before or after winter storage?
>>>>>
>>>>> Does it make any difference as to when I do my oil change on my 2.1L
>>>> Westy?
>>>>> I'm due for one based on time/mileage, but wondered if I should wait
>>>> until
>>>>> Spring when I start driving again or should it be completed before I
>>>> store
>>>>> it in my insulated garage for the winter?
>>>>>
>>>>> Thanks!!
>>>>>
>>>>> Jack R.
>>>>> 84 Westy, with 2.1L from 91 syncro
>>>>> N. of Detroit
>>>>>
>>>>
>>>
>>