As Tom says, Oil Analysis tells much more than what's happening with the
oil. Since the oil in one way or another comes in contact with virtually
all the stuff in the engine compartment.
The Oil Analysis Report is basically grouped in 3 sections. 1st, the
properties of the metals typically found in an engine are analyzed with
their levels noted. If a level is too high, that contaminate of flagged.
Next, the oils additives are quantified to define what their levels are. If
high, they are noted and flagged. Next, the Oils' physical properties are
tested - the SAE, amount of fuel in the oil, any water or Glycol in the oil
and a few other things. A spreadsheet showing the analysis results for a
couple of hundred reports are shown at http://members.rennlist.com/oil
Also, as Tom suggested, many engine problems can be determined by
checking the results. For example, when the Silicon level is too high
(again, as Tom mentioned) a problem with the air filter intake possibly
exists. I have seen air filters improperly seated or missing the o-rings
which allowed intake air to bypass the filter and bring air filled with dirt
into the engine. Also, on diesel engines, the Soot is measured which is a
good indication of Blow by - which allows contaminated air to get past the
rings and into the oil. Thus a high level of soot can indicate weak rings -
or use of an oil which does not properly suspend and carry the contaminates
to the filter for removal.
Obviously some of these bits of information do not lend themselves to
easy fixes but knowing about a problem often opens up new possibile
solutions.
HTHs
Larry T (67 MGB, 74 911, 78 240D, 91 300D)
www.youroil.net for Oil Analysis and Weber Parts
Test Results http://members.rennlist.com/oil
PORSCHE POSTERS! youroil.net
Weber Carb Info http://members.rennlist.com/webercarbs
.
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <mercedes@okiebenz.com>; "Curt Raymond"
<[EMAIL PROTECTED]>
Cc: "Diesel List" <mercedes@okiebenz.com>
Sent: Tuesday, December 04, 2007 2:18 PM
Subject: Re: [MBZ] Synthetic Oils
> Oil analysis is not just about your oil. It also uncovered leaky head
> gaskets,
> unfiltered air intake and accelerated engine wear.
>
> For example, an oil analysis can tell you that you have abnormal cam lobe
> wear
> by the type & amount of metals found in the oil. This may lead you to
> discover
> (in a 1972 4.5 liter gas engine, BTW) that the plastic spray bar keepers
> have
> worn out and most of the oil destined for the cam lobes is actually going
> elsewhere.
>
> Or you may find higher than normal silica in the oil, which would indicate
> unfiltered air entering the engine and might lead to the realization that
> the
> new K&N filter you installed wasn't such a good idea afterall.
>
> Tom
> www.kegkits.com
>
> Quoting Curt Raymond <[EMAIL PROTECTED]>:
>
>>
>> I'm of the mind that extended oil changes are something you work up to.
>> How do I know 20,000 is safe if I don't try 19k first and so on?
>>
>> Besides what works well for one engine may not work well for another. As
>> Marshall said you have to decide whats right for YOUR engine.
>>
>> -Curt
>>
>> Date: Tue, 04 Dec 2007 17:07:44 +0000
>> From: [EMAIL PROTECTED]
>> Subject: Re: [MBZ] Synthetic Oils
>> To: Mercedes Discussion List <mercedes@okiebenz.com>
>> Message-ID:
>>
>>
> <[EMAIL PROTECTED]>
>>
>> Content-Type: text/plain
>>
>> Curt,
>> Why Change it? My car ran 20KMI between changes. Pull a sample and
>> have it analyzed, I'm betting you are only 50% depleted.
>>
>> Pete
>>
>>
>> ---------------------------------
>> Be a better sports nut! Let your teams follow you with Yahoo Mobile. Try
>> it now.
>> _______________________________________
>> http://www.okiebenz.com
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>>
>
>
>
> Thanks,
> Tom Hargrave
> 256-656-1924
>
> _______________________________________
> http://www.okiebenz.com
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>
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>
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