but could the change in oil from 20w50 to 10w30 account for this drop in
pressure and higher temperatures?
----------------
YES
Most people that run 10/30 in the summer months have flickering oil light
at 800/900 rpms. That is sort of the key to tell you to run 20/50 in
Summer months.

Stan Wilder

On Mon, 23 Dec 2002 11:16:22 -0500 80 Westy Pokey <pokey@VANAGON.ORG>
writes:
> This new learning amazes me.
>
> Here is something interesting. Last summer I brought Pokey in
> for an oil change (yes I know I should be doing it myself but
> oil changes are cheap and I find myself too busy sometimes)
> and they inadvertently used 10w30. All of a sudden I saw a
> drop in oil pressure (maybe to 20 psi on the highway), and
> much higher operating themperatures. Hence I went out and
> bought an auxillary oil cooler (as yet to be installed).
>
> The season was ending, it got colder out and my temperatures
> fell back into acceptable levels. The pressure did not come
> back and I was going to look into this over the witer. I was
> going to get the oil changed again (hence my original
> question - If you did not read my previous post, I was
> wondering about using 20w50 in the winter as that is what I
> normally run.).
>
> Now forgive me, my mechanical incompetance is surely
> showing... but could the change in oil from 20w50 to 10w30
> account for this drop in pressure and higher temperatures?
>
> Thanks,
> Chris
>
> ---- Original message ----
> >Date: Sun, 22 Dec 2002 15:20:06 -0500
> >From: 80 Westy Pokey <pokey@vanagon.org>
> >Subject: Is 20w50 Oil OK in the winter
> >To: The_Bug_Pack@yahoogroups.com, vanagon@gerry.vanagon.com,
> type2@type2.com
> >
> >Is 20w5 Oil OK in Winter? I drive my van almost exclusively
> >in the summer and have always used Castrol GTX 20w50 Oil.
> >Now it is December, temperature is just below freezing, but
> >the roads in Toronto are free of snow and salt. I was
> >thinking of using the van to help in my move. I have to
> >change the oil nyway so I was wondering what weight I should
> >use in the winter months. In my Chevy I always use 10w30 in
> >summer and 5w30 in Winter.
> >
> >Thanks,
> >Chris
>
>

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