*"causes the oil to become slightly acidic"*

I am not sure about this on the gasoline engines... but I am certain about
the diesel engines - Diesel fuel has sulfur in it and when Sulfur combined
with water and oxygen it becomes Sulfuric Acid (H2SO4).. how do I know
about it? Because I used to own diesel powered cars (Peugeot and Mercedes)
and my mechanic warned me about it.

On Sat, Oct 9, 2021 at 1:39 PM OlRivrRat <OlRivrRat@comcast.net> wrote:

>         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
> >>>>>
> >>>>
> >>>
> >>
>