[s-cars] Winter weight oil recommendations, temporarily seized brake caliper.....

[Scott Justusson]

 Cough....  Well since you brought it up.  This has nothing to do with 'viscosity breakdown' IMO.  Most 0w,5w and 10w oils at temps of-5 have the same pumping stress (energy required to overcome viscosity).  Since the OP used a 0W-40 synthetic, his oil choice pumping stress is the lowest available on the market.   Rephrased:   If indeed this is a pumping stress problem, any change to the weight of the oil from a 0W-xx  will only increase that problem in cold weather climes.

Not sure how one comes up with a CPS problem from the post, so you could be 'right', I just have doubts how you got there.  Me, I live in Chicago, and whenever I heard this problem, my first suspect would be the battery/electrical system, Larry L proposes.  CCA problem.

SJ


 

-----Original Message-----
From: Taka Mizutani <t44tqtro at gmail.com>
To: <s-car-list at audifans.com> <s-car-list at audifans.com>
Sent: Wed, Dec 11, 2013 1:56 pm
Subject: Re: [s-cars] Winter weight oil recommendations, temporarily seized brake caliper.....


Considering that viscosity breakdown in oil generally results in the oil
getting thinner, you don't have to worry about it getting thicker.

I doubt that 0W40 oil is going to cause issues for you, that's pretty thin
stuff. With an AAN, I would look at electrical connections being corroded
or a failing CPS. I'm sure Scott will
correct me if I'm wrong.


On Wed, Dec 11, 2013 at 2:48 PM, Larry <larrycleung at gmail.com> wrote:

> Well -5 F isn't too common by me, when it has happened, the car crankily
> started fine with 10W-30 Mobil 1, so I doubt it is your 0W-40 causing the
> problem (most certainly your oil was at 0 on the viscosity scale that
> temp), I'd bet your battery is getting weak, or you have corrosion at the
> terminals or the dreaded splice. Easiest to test the battery first.
>
> Sent from my iPad
>
> > On Dec 11, 2013, at 2:31 PM, "Jim Fleischer" <jim at almgt.com> wrote:
> >
> > Hey all,
> >
> > Its been a very cold start to the winter here in Colorado, and for the
> first time since owning my car, she wouldn't start the other day.  Turned
> over okay, but not fast enough to "catch."  Temp was somewhere in the -5F
> range.  After a space heater under the iol pan, she started fine.....I'm
> due for an oil change anyway, and usually run 0-W40 synthetic year round
> with no troubles.  Question is, does the fact that I'm at the end of the
> oil change cycle contribute to the added thickness of the oil, or should I
> consider something thinner as far as oil goes?  I tend to drive spiritedly,
> so I need to heat protection on the upper end.  Thoughts?  My garage isn't
> insulated or heated.....
> >
> > My left rear brake caliper had seized as well, took a few blocks of
> driving to free it up and seems to be working fine since......something I
> should check there as well?
> >
> > Thanks in advance and best wishes for the holiday season!
> >
> > Jim Fleischer
> > '95 S6 avant 160K
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