[NSRCA-discussion] After run oil?

[wgalligan]

Here in the Dallas area we have not had to worry about too much humidity to 
lately.  But it seems that every time Keith Black and I went to the Houston 
area contest in June we ended up replacing a bearing shortly after that.  We 
were running std steel bearings then also.

Wayne
----- Original Message ----- 
From: "Tom Simes" <simestd at netexpress.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, May 09, 2007 4:34 PM
Subject: Re: [NSRCA-discussion] After run oil?


> On Wed, 9 May 2007 14:42:00 -0500
> "wgalligan" <wgalligan at goodsonacura.com> wrote:
>
>> OK.... time to open this can of worms again.   Are there some types of
>>
>> additives that can cause fouling or glassing of the plug element?  It
>> seems  to me after I stopped using after run oil my plugs seemed to
>> last longer.  I  am like Dr. Mike, just run it. I usually run the
>> engine dry if I know its  going to set up for a spell. When I take the
>> engine apart even after running  the engine out of fuel there is still
>> a LOT of oil in the crank.  I am sure  if the engine is going to sit
>> unrun for extended periods its a good idea to  lube the engine by
>> taking out the plug and running plenty of an  anti-corrosive type of
>> lube through the engine to keep the crank and sleeve  from developing
>> rust.
>
> What's the average relative humidity where you and Dr. Mike are?  When I
> lived in Arizona and New Mexico, the RH was so low I just didn't have to
> worry about corrosion.  Now that I live in Anchorage, high RH, a
> proximity to salt water and huge temperature swings combine to make
> corrosion a big issue.  I fly all winter long and when cold soaked gear
> is moved back into a warm environment, visible condensation forms all
> over it.
>
> While corrosion prevention is part of the picture, I'm a little
> surprised that nobody has mentioned softening carbon deposits as a
> feature of using after run oil.  The high solvent content in Marvel
> Mystery Oil or Rislone should help mitigate some of the carbon build up
> in the 4 stroke crowd.  As far as I know though, both those solutions
> would be a definate no no in a YS due to their effect on the silicone
> components.
>
> With regard to the plug fouling quesion, MMO has been used for years
> in aviation circles (100% scale) as a fuel additive to help counteract
> lead fouling.  However, I would definately stay away from any of the oil
> additives with zink compounds in them though (Slick 50, Motor Medic,
> STP...)
>
> Thanks for the information guys :)
>
> Tom
>
> ======================================================================
>   "Z-80 system stack overflow.  Shut 'er down Scotty, the system's
>         sucking mud" - Error message on TRS 80 Model-16B
>
> Tom Simes                                       simestd at netexpress.com
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