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More than just oxygen, the oil is also exposed to the byproducts of
combustion - CO, CO2, H2O and more. These byproducts can combine to form
acidic contaminants. Fresh oil has additives to combat this but they can't
do it forever.
EjR
On Mon, Aug 29, 2022 at 4:41 PM <eric@megageek.com> wrote:
> Gene asks...
> >Then why does oil sitting in a rarely used engine need to be changed?
>
> Gene, because in an engine the oil is exposed to oxygen and other airborne
> contaminates.
> In the (unopened) bottle, the oil isn't exposed to air.
>
> That is my understanding.
>
> Moose
>
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--
Eric Russell
Mebane, NC
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<div dir=3D"ltr">More than just oxygen, the oil is also exposed to the bypr=
oducts of combustion - CO, CO2, H2O and more. These byproducts can combine =
to form acidic contaminants. Fresh oil has additives to combat this but the=
y can't do it forever.=C2=A0<div><br></div><div>EjR=C2=A0</div></div><b=
r><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, =
Aug 29, 2022 at 4:41 PM <<a href=3D"mailto:eric@megageek.com";>eric@megag=
eek.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><font size=3D"2" face=3D"sans-serif">Gene asks...</font>
<br><font size=3D"2" face=3D"sans-serif">></font><font size=3D"3">Then w=
hy does
oil sitting in a rarely used engine need to be changed?=C2=A0</font>
<br>
<br><font size=3D"3">Gene, because in an engine the oil is exposed to oxyge=
n
and other airborne contaminates.</font>
<br><font size=3D"3">In the (unopened) bottle, the oil isn't exposed to=
air.
=C2=A0</font>
<br><font size=3D"3"><br>
That is my understanding.</font>
<br>
<br><font size=3D"3">Moose</font>
<br>
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<br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
class=3D"gmail_signature"><div dir=3D"ltr">Eric Russell<div>Mebane, NC</di=
v></div></div>
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