Oil Analyzed

G

gene

New member
Sep 29, 1999
2,215
0
0
some one used to advertise in Motor Home Market place but I have not found
the reference yet.

gene

>GMCers
>
>A long time ago we used to send the oil from our race cars off to
>be analyzed. We would get a report back telling us all sorts of stuff.
>It would tell us how wear was going. How much life was still left in the
>oil ect. That was 30 some years ago. Does anybody know who is a
>good company to do this now? Someone involved with fleet operations
>should know of this service. If any of you know of a good company
>please holler. I want to get the oil analyzed that I take out of the GMC
>this Thursday. TIA
>
>Take Care
>Arch
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/
 
I am pretty sure that you can get it done, almost locally even. Most larger
centres have an outfit that can do this. All the trucks in our fire dept.
fleet get tested semi-annually. Phone a fleet dept in any city and I would
think they would tell you where. I don't think it is cheap though.
Darren

> GMCers
>
> A long time ago we used to send the oil from our race cars off to
> be analyzed. We would get a report back telling us all sorts of stuff.
> It would tell us how wear was going. How much life was still left in the
> oil ect. That was 30 some years ago. Does anybody know who is a
> good company to do this now? Someone involved with fleet operations
> should know of this service. If any of you know of a good company
> please holler. I want to get the oil analyzed that I take out of the GMC
> this Thursday. TIA
>
> Take Care
> Arch

- --
Darren Paget
76 Experimental
Another Fab Day
http://www.TZEplus.com
 
Go find a friendly Mobil or Texaco Lubricants distributor. It won't be free
but the cost is minimal and the results you get back are as you say very
informative.
Bob Neeb
- ----- Original Message -----
From:
To:
Sent: Sunday, July 09, 2000 9:51 AM
Subject: GMC: Oil Analyzed

> GMCers
>
> A long time ago we used to send the oil from our race cars off to
> be analyzed. We would get a report back telling us all sorts of stuff.
> It would tell us how wear was going. How much life was still left in the
> oil ect. That was 30 some years ago. Does anybody know who is a
> good company to do this now? Someone involved with fleet operations
> should know of this service. If any of you know of a good company
> please holler. I want to get the oil analyzed that I take out of the GMC
> this Thursday. TIA
>
> Take Care
> Arch
 
> GMCers
>
> A long time ago we used to send the oil from our race cars off to
> be analyzed. We would get a report back telling us all sorts of
> stuff. It would tell us how wear was going. How much life was still
left in
> the oil ect. That was 30 some years ago. Does anybody know who is a
> good company to do this now? Someone involved with fleet operations
> should know of this service. If any of you know of a good company
> please holler. I want to get the oil analyzed that I take out of the
> GMC
> this Thursday. TIA
>
> Take Care
> Arch

I send my oil out every couple of years for analysis but the data is at
home and I am not. Ask any Amsoil dealer. That is where I bought the
kits.

David Lee Greenberg
The GMC Motorhome Registry
Dedicated To The Preservation of the Classic GMC Motorhome
http://www.GMCss.com/Registry.htm
http://www.Buskirk-RushRV/GMC-Registry/online-registry.htm
 
Several years ago I worked for a company that manufactured filtration
systems. One of the customers was General Electric, which was supplying jet
engines to Grumman, to be used on military planes. We were analyzing oil
from these jet engines. We gave them a breakdown of particulate composition,
which metals were most prevalent. Knowing the metallic composition of each
engine part, they could then use this data to determine what parts were
wearing, and if they were wearing more than expected. I once asked what they
did with this information and was told "not much" as they usually replaced
the engines long before anything ever wore out. As I got my puny paycheck,
and saw how much taxes were being taken out, and couldn't help but marvel at
yet another example of tax dollars well spent.

I don't know of any place that will analyze your oil, but unless you know
the metallic composition of various pieces, the information may not be all
that valuable.

Just my 2 cents (less taxes taken out to replace jet engines that aren't
worn out yet... so 0.8 cents)

Tony B.

- ----- Original Message -----
From: tom warner
To:
Sent: Monday, July 10, 2000 3:15 PM
Subject: Re: GMC: Oil Analyzed

> Im interested. What do you hope to find out from the oil analysis and what
> will you do with the data you receive?
>
> tom
>

> >> GMCers
> >>
> >> A long time ago we used to send the oil from our race cars off to
> >> be analyzed. We would get a report back telling us all sorts of
> >> stuff. It would tell us how wear was going. How much life was still
> >left in
> >> the oil ect. That was 30 some years ago. Does anybody know who is a
> >> good company to do this now? Someone involved with fleet operations
> >> should know of this service. If any of you know of a good company
> >> please holler. I want to get the oil analyzed that I take out of the
> >> GMC
> >> this Thursday. TIA
> >>
> >> Take Care
> >> Arch
> >
> >I send my oil out every couple of years for analysis but the data is at
> >home and I am not. Ask any Amsoil dealer. That is where I bought the
> >kits.
> >
> > David Lee Greenberg
> > The GMC Motorhome Registry
> >Dedicated To The Preservation of the Classic GMC Motorhome
> >http://www.GMCss.com/Registry.htm
> >http://www.Buskirk-RushRV/GMC-Registry/online-registry.htm
> >
> >
>
>
 
> Im interested. What do you hope to find out from the oil analysis and
> what will you do with the data you receive?
>
> tom

As for me, I file the data after comparing with previous reports. The
analysis shows chrome and other metals in the oil and indicate sources
for the various metals found so you will be able to forecast whether
mains, cranks, valves, etc are heading south.

It can also help you assess whether there are any coolant leaks or other
contaminants in your oil that don't belong there.

David Lee Greenberg
The GMC Motorhome Registry
Dedicated To The Preservation of the Classic GMC Motorhome
http://www.GMCss.com/Registry.htm
http://www.Buskirk-RushRV/GMC-Registry/online-registry.htm
 
Tom

What you are saying echoes the feelings of many of the engineers I worked
with when we were designing, installing, and servicing filtration units on
engines of all types, hydraulic subsystems, and many other applications.
Something can definitely be learned from such oil or fluid analysis, but the
knowledge you will gain is usually there for the taking by observing other
aspects of engine (or other system) function. The engineers on the jet
engines would often tell me what I was going to find before we even ran the
analysis and they were remarkably accurate.

Tony Bad

- ----- Original Message -----
From: tom warner
To:
Sent: Monday, July 10, 2000 5:38 PM
Subject: Re: GMC: Oil Analyzed

> That in effect was the point I was going to make Tony. In my opinion there
> is little meaningful information to be gained by doing an oil analysis on
> the olds 455 engine. I once workded in a Precision Measurement Equipment
> Laboratory on an Air Force base and had access to many of these oil
analysis
> tests. As far as I remember only in one instance did I ever see the oil
> analysis used and that was for the large diesels used in the bases back up
> power generation. For those diesel units the oil was never changed.
Instead
> the analysis told the tecnicians what and how much additives to add to the
> oil to make it perform to specifications. Only the filters were changed
and
> a appropriate amount of oil added.
>
> In the case of the olds 455 I do not think there is any meaningful
> information that could be obtained over and above tehe information that is
> obtained during an oil change.
>
> For instance many dedicated owners split their oil filters and inspect the
> contents during each oil change and companies like Summit racing sell
> products exactly for this purpose. IN addition when changing oil smell
and
> feel it after you collect it in the waste pan. The texture and smell tell
> you a lot about the condition of your engine. Also the oil filter plug
> contains a small magnet and it should be inspected for trace amounts of
> metalc and the amounts and kinds sometimes alerts you to t things that are
> going on within the engine.
>
> Whats the best thing to do to your engine. Make the oil and filter easy to
> change and change it wiht good quality oil every 3000 miles
>
> just my thoughts.
>
> tom
>
>

> >Several years ago I worked for a company that manufactured filtration
> >systems. One of the customers was General Electric, which was supplying
jet
> >engines to Grumman, to be used on military planes. We were analyzing oil
> >from these jet engines. We gave them a breakdown of particulate
composition,
> >which metals were most prevalent. Knowing the metallic composition of
each
> >engine part, they could then use this data to determine what parts were
> >wearing, and if they were wearing more than expected. I once asked what
they
> >did with this information and was told "not much" as they usually
replaced
> >the engines long before anything ever wore out. As I got my puny
paycheck,
> >and saw how much taxes were being taken out, and couldn't help but marvel
at
> >yet another example of tax dollars well spent.
> >
> >I don't know of any place that will analyze your oil, but unless you know
> >the metallic composition of various pieces, the information may not be
all
> >that valuable.
> >
> >Just my 2 cents (less taxes taken out to replace jet engines that aren't
> >worn out yet... so 0.8 cents)
> >
> >Tony B.
> >
> >
> >
> >----- Original Message -----
> >From: tom warner
> >To:
> >Sent: Monday, July 10, 2000 3:15 PM
> >Subject: Re: GMC: Oil Analyzed
> >
> >
> >> Im interested. What do you hope to find out from the oil analysis and
what
> >> will you do with the data you receive?
> >>
> >> tom
> >>

> >> >> GMCers
> >> >>
> >> >> A long time ago we used to send the oil from our race cars off to
> >> >> be analyzed. We would get a report back telling us all sorts of
> >> >> stuff. It would tell us how wear was going. How much life was still
> >> >left in
> >> >> the oil ect. That was 30 some years ago. Does anybody know who is a
> >> >> good company to do this now? Someone involved with fleet operations
> >> >> should know of this service. If any of you know of a good company
> >> >> please holler. I want to get the oil analyzed that I take out of the
> >> >> GMC
> >> >> this Thursday. TIA
> >> >>
> >> >> Take Care
> >> >> Arch
> >> >
> >> >I send my oil out every couple of years for analysis but the data is
at
> >> >home and I am not. Ask any Amsoil dealer. That is where I bought the
> >> >kits.
> >> >
> >> > David Lee Greenberg
> >> > The GMC Motorhome Registry
> >> >Dedicated To The Preservation of the Classic GMC Motorhome
> >> >http://www.GMCss.com/Registry.htm
> >> >http://www.Buskirk-RushRV/GMC-Registry/online-registry.htm
> >> >
> >> >
> >>
> >>
> >
> >
>
>
 
Tom,
I will post tomorrow the specific tests done with Mobil test sampling. Test
kits should run about $10.75 per test. The beauty of this testing is it
allows you to over time, they keep track of your engine, to see the changes
in the engine oil composition. So if for instance on your last oil change
it suddenly shows antifreeze in the oil that wasn't present in previous oil
changes you know you have a problem. The same is true when metals present
in the oil sample.

bob neeb

- ----- Original Message -----
From: tom warner
To:
Sent: Monday, July 10, 2000 5:38 PM
Subject: Re: GMC: Oil Analyzed

> That in effect was the point I was going to make Tony. In my opinion there
> is little meaningful information to be gained by doing an oil analysis on
> the olds 455 engine. I once workded in a Precision Measurement Equipment
> Laboratory on an Air Force base and had access to many of these oil
analysis
> tests. As far as I remember only in one instance did I ever see the oil
> analysis used and that was for the large diesels used in the bases back up
> power generation. For those diesel units the oil was never changed.
Instead
> the analysis told the tecnicians what and how much additives to add to the
> oil to make it perform to specifications. Only the filters were changed
and
> a appropriate amount of oil added.
>
> In the case of the olds 455 I do not think there is any meaningful
> information that could be obtained over and above tehe information that is
> obtained during an oil change.
>
> For instance many dedicated owners split their oil filters and inspect the
> contents during each oil change and companies like Summit racing sell
> products exactly for this purpose. IN addition when changing oil smell
and
> feel it after you collect it in the waste pan. The texture and smell tell
> you a lot about the condition of your engine. Also the oil filter plug
> contains a small magnet and it should be inspected for trace amounts of
> metalc and the amounts and kinds sometimes alerts you to t things that are
> going on within the engine.
>
> Whats the best thing to do to your engine. Make the oil and filter easy to
> change and change it wiht good quality oil every 3000 miles
>
> just my thoughts.
>
> tom
>
>

> >Several years ago I worked for a company that manufactured filtration
> >systems. One of the customers was General Electric, which was supplying
jet
> >engines to Grumman, to be used on military planes. We were analyzing oil
> >from these jet engines. We gave them a breakdown of particulate
composition,
> >which metals were most prevalent. Knowing the metallic composition of
each
> >engine part, they could then use this data to determine what parts were
> >wearing, and if they were wearing more than expected. I once asked what
they
> >did with this information and was told "not much" as they usually
replaced
> >the engines long before anything ever wore out. As I got my puny
paycheck,
> >and saw how much taxes were being taken out, and couldn't help but marvel
at
> >yet another example of tax dollars well spent.
> >
> >I don't know of any place that will analyze your oil, but unless you know
> >the metallic composition of various pieces, the information may not be
all
> >that valuable.
> >
> >Just my 2 cents (less taxes taken out to replace jet engines that aren't
> >worn out yet... so 0.8 cents)
> >
> >Tony B.
> >
> >
> >
> >----- Original Message -----
> >From: tom warner
> >To:
> >Sent: Monday, July 10, 2000 3:15 PM
> >Subject: Re: GMC: Oil Analyzed
> >
> >
> >> Im interested. What do you hope to find out from the oil analysis and
what
> >> will you do with the data you receive?
> >>
> >> tom
> >>

> >> >> GMCers
> >> >>
> >> >> A long time ago we used to send the oil from our race cars off to
> >> >> be analyzed. We would get a report back telling us all sorts of
> >> >> stuff. It would tell us how wear was going. How much life was still
> >> >left in
> >> >> the oil ect. That was 30 some years ago. Does anybody know who is a
> >> >> good company to do this now? Someone involved with fleet operations
> >> >> should know of this service. If any of you know of a good company
> >> >> please holler. I want to get the oil analyzed that I take out of the
> >> >> GMC
> >> >> this Thursday. TIA
> >> >>
> >> >> Take Care
> >> >> Arch
> >> >
> >> >I send my oil out every couple of years for analysis but the data is
at
> >> >home and I am not. Ask any Amsoil dealer. That is where I bought the
> >> >kits.
> >> >
> >> > David Lee Greenberg
> >> > The GMC Motorhome Registry
> >> >Dedicated To The Preservation of the Classic GMC Motorhome
> >> >http://www.GMCss.com/Registry.htm
> >> >http://www.Buskirk-RushRV/GMC-Registry/online-registry.htm
> >> >
> >> >
> >>
> >>
> >
> >
>
 
That is positively true with conventional motor oil, but when you are
dealing with synthetics, the oil life is much longer, into the 25,000 mile
range provided you change your filter on a regular basis. You would be
watching the oil over the lifespan of a year.

- ----- Original Message -----
From: tom warner
To:
Sent: Monday, July 10, 2000 8:12 PM
Subject: Re: GMC: Oil Analyzed

> Bob while the tests may show this, it is not useful information in my
> opinion. If there is antifreeze in the oil believe me you will know it.
And
> the information is useless unless you detect the antifreeze early on. HOw
> often are you going to test the oil at $10.75 per test (does that include
> shipping and other add ons).IN addition if you change your oil correctly
you
> will know if there is any metals in the oil(there always is). Im sorry but
> good preventative maintenance is the best solution along with knowledgable
> people to work on the coaches.
>
> tom
>
>
>
>
>

> >Tom,
> >I will post tomorrow the specific tests done with Mobil test sampling.
Test
> >kits should run about $10.75 per test. The beauty of this testing is it
> >allows you to over time, they keep track of your engine, to see the
changes
> >in the engine oil composition. So if for instance on your last oil
change
> >it suddenly shows antifreeze in the oil that wasn't present in previous
oil
> >changes you know you have a problem. The same is true when metals
present
> >in the oil sample.
> >
> >bob neeb
> >
> >----- Original Message -----
> >From: tom warner
> >To:
> >Sent: Monday, July 10, 2000 5:38 PM
> >Subject: Re: GMC: Oil Analyzed
> >
> >
> >> That in effect was the point I was going to make Tony. In my opinion
there
> >> is little meaningful information to be gained by doing an oil analysis
on
> >> the olds 455 engine. I once workded in a Precision Measurement
Equipment
> >> Laboratory on an Air Force base and had access to many of these oil
> >analysis
> >> tests. As far as I remember only in one instance did I ever see the oil
> >> analysis used and that was for the large diesels used in the bases back
up
> >> power generation. For those diesel units the oil was never changed.
> >Instead
> >> the analysis told the tecnicians what and how much additives to add to
the
> >> oil to make it perform to specifications. Only the filters were changed
> >and
> >> a appropriate amount of oil added.
> >>
> >> In the case of the olds 455 I do not think there is any meaningful
> >> information that could be obtained over and above tehe information that
is
> >> obtained during an oil change.
> >>
> >> For instance many dedicated owners split their oil filters and inspect
the
> >> contents during each oil change and companies like Summit racing sell
> >> products exactly for this purpose. IN addition when changing oil smell
> >and
> >> feel it after you collect it in the waste pan. The texture and smell
tell
> >> you a lot about the condition of your engine. Also the oil filter plug
> >> contains a small magnet and it should be inspected for trace amounts of
> >> metalc and the amounts and kinds sometimes alerts you to t things that
are
> >> going on within the engine.
> >>
> >> Whats the best thing to do to your engine. Make the oil and filter easy
to
> >> change and change it wiht good quality oil every 3000 miles
> >>
> >> just my thoughts.
> >>
> >> tom
> >>
> >>

> >> >Several years ago I worked for a company that manufactured filtration
> >> >systems. One of the customers was General Electric, which was
supplying
> >jet
> >> >engines to Grumman, to be used on military planes. We were analyzing
oil
> >> >from these jet engines. We gave them a breakdown of particulate
> >composition,
> >> >which metals were most prevalent. Knowing the metallic composition of
> >each
> >> >engine part, they could then use this data to determine what parts
were
> >> >wearing, and if they were wearing more than expected. I once asked
what
> >they
> >> >did with this information and was told "not much" as they usually
> >replaced
> >> >the engines long before anything ever wore out. As I got my puny
> >paycheck,
> >> >and saw how much taxes were being taken out, and couldn't help but
marvel
> >at
> >> >yet another example of tax dollars well spent.
> >> >
> >> >I don't know of any place that will analyze your oil, but unless you
know
> >> >the metallic composition of various pieces, the information may not be
> >all
> >> >that valuable.
> >> >
> >> >Just my 2 cents (less taxes taken out to replace jet engines that
aren't
> >> >worn out yet... so 0.8 cents)
> >> >
> >> >Tony B.
> >> >
> >> >
> >> >
> >> >----- Original Message -----
> >> >From: tom warner
> >> >To:
> >> >Sent: Monday, July 10, 2000 3:15 PM
> >> >Subject: Re: GMC: Oil Analyzed
> >> >
> >> >
> >> >> Im interested. What do you hope to find out from the oil analysis
and
> >what
> >> >> will you do with the data you receive?
> >> >>
> >> >> tom
> >> >>

> >> >> >> GMCers
> >> >> >>
> >> >> >> A long time ago we used to send the oil from our race cars off to
> >> >> >> be analyzed. We would get a report back telling us all sorts of
> >> >> >> stuff. It would tell us how wear was going. How much life was
still
> >> >> >left in
> >> >> >> the oil ect. That was 30 some years ago. Does anybody know who
is a
> >> >> >> good company to do this now? Someone involved with fleet
operations
> >> >> >> should know of this service. If any of you know of a good company
> >> >> >> please holler. I want to get the oil analyzed that I take out of
the
> >> >> >> GMC
> >> >> >> this Thursday. TIA
> >> >> >>
> >> >> >> Take Care
> >> >> >> Arch
> >> >> >
> >> >> >I send my oil out every couple of years for analysis but the data
is
> >at
> >> >> >home and I am not. Ask any Amsoil dealer. That is where I bought
the
> >> >> >kits.
> >> >> >
> >> >> > David Lee Greenberg
> >> >> > The GMC Motorhome Registry
> >> >> >Dedicated To The Preservation of the Classic GMC Motorhome
> >> >> >http://www.GMCss.com/Registry.htm
> >> >> >http://www.Buskirk-RushRV/GMC-Registry/online-registry.htm
> >> >> >
> >> >> >
> >> >>
> >> >>
> >> >
> >> >
> >>
> >
> >
> >
>
 
As I posted earlier, I personally ran many oil analysis tests, running a
full analysis for contaminants of all types. The engineers for the military
jet engines felt that the oil analysis would verify that the engine was
working well, but rarely gave much advance warning of the kind of
catastrophic failure that one would hope to have an advance warning of.

Repeated tests over the long term can be useful in an engine that gets
regular use, or one in constant use, (like trucks, trains, machinery), but
will be affected by sitting for long periods. Unfortunately our coach fits
into this latter category. Tests over the long term may be skewed by this.

Just another factor to weigh when considering the merits and costs of such
testing.

Tony

- ----- Original Message -----
From:
To:
Sent: Monday, July 10, 2000 8:43 PM
Subject: Re: GMC: Oil Analyzed

> In a message dated 7/10/00 5:39:18 PM Eastern Daylight Time,
warner

>
> is little meaningful information to be gained by doing an oil analysis on
> the olds 455 engine. >>
>
> Tom,
>
> You are right that AN oil analysis won't tell you much. Doing an analysis
at
> every oil change will. The data page you get shows the new sample data
plus
> all previous samples submitted for that particular vehicle. Since most
> measurements are in PPM, minute traces are detected. One sample won't tell
> you much, but consecutive samples can show a trend long before there is
any
> other hint of a failure. At $10 to $20 per test, one would have to decide
if
> it is worth it.
>
> Dave
> 73 GoBus 230
>
 
>As I posted earlier, I personally ran many oil analysis tests, running a
>full analysis for contaminants of all types. The engineers for the military
>jet engines felt that the oil analysis would verify that the engine was
>working well, but rarely gave much advance warning of the kind of
>catastrophic failure that one would hope to have an advance warning of.

The tests that I am aware of that do yield good information (and
prediction) are used on stationary engines that run continuously (or close
enough to be continuous). There are numerous SAE reports that correlate
particulates to specific failure mechanisms. By examining the size and
shape of particles it is possible to predict bearing failure for example.

see

http://www.noria.com/bearing1.html
http://www.herguth.com/technical.htm
for some reports on particulates in oil.

If you're interested in the SAE reports, here's a good place to start.

http://www.sae.org/products/topics/GV_OIL_P.htm

Henry
 
You amaze me Henry. I surf alot when I am not working but you really get
the grand prize. Amazing stuff you find.

- ----- Original Message -----
From: Henry Davis
To:
Sent: Monday, July 10, 2000 9:34 PM
Subject: Re: GMC: Oil Analyzed

> >As I posted earlier, I personally ran many oil analysis tests, running a
> >full analysis for contaminants of all types. The engineers for the
military
> >jet engines felt that the oil analysis would verify that the engine was
> >working well, but rarely gave much advance warning of the kind of
> >catastrophic failure that one would hope to have an advance warning of.
>
> The tests that I am aware of that do yield good information (and
> prediction) are used on stationary engines that run continuously (or close
> enough to be continuous). There are numerous SAE reports that correlate
> particulates to specific failure mechanisms. By examining the size and
> shape of particles it is possible to predict bearing failure for example.
>
> see
>
> http://www.noria.com/bearing1.html
> http://www.herguth.com/technical.htm
> for some reports on particulates in oil.
>
> If you're interested in the SAE reports, here's a good place to start.
>
> http://www.sae.org/products/topics/GV_OIL_P.htm
>
>
> Henry
>
>
 
Not to be a pest or anything, but fleet vehicles are usually run in a far
more consistent pattern than most private vehicles. They also usually have a
log book with daily use or mileage numbers. These factors make such an
analysis a far more valuable tool. In a vehicle with a random usage
patterns, or one that sits for a long period, numbers that would mean a
major problem if they turned up on a fleet oil analysis study, may be
meaningless when noted on your GMC engine. (or vice versa)

As I said before, I am sure something may turn up in such a study that would
be useful, but my feeling is that a far better use of resources would be in
good monitoring equipment (gauges), frequent preventive maintenance, and an
observant operator and mechanic. While an oil analysis might be icing on
this cake, it would be one heavily iced cake!

Just my thoughts

Tony

- ----- Original Message -----
From:
To:
Sent: Tuesday, July 11, 2000 10:27 PM
Subject: Re: GMC: Oil Analyzed

> In a message dated 07/11/2000 6:03:52 PM Central Daylight Time,

>
> > And lastly oil analysis for the most part was developed for large
> > stationary engines that run at a constant speed so that the data can be
> > correlated.
> >
> Tom
>
> I dont want a fight! You need to come up to speed on what fleet managers
> are doing today. Looking at what is in the oil can tell you a lot. Not
telling
> you should do this just saying that some people might want to look at what
> it can do.
>
> Take Care
> Arch
>
 
> >

> > > Im interested. What do you hope to find out from the oil analysis and
> > > what will you do with the data you receive?
> > >
> > > tom
>
>As I said before I don't test any more, when was the last time you had
>a main bearing fail?

Well there's been more than one list subscriber with main bearing failure.

>However forgot to mention one other reason for oil analysis, it will show
>very clearly if your air filter is leaking. Pinholes, improper installation
>banging them on the wall to clean them :)
>A leaking air filter can lead to high wear and ultimately failure if it
>goes on long enough in dusty conditions.

In -theory- you can tell when bearings are approaching wear-out. See
http://www.timken.com/bearings/fundamen/calculate.asp
for definitions of bearing wear out and how to determine if it's happening.

At normal highway speed and using the recommended oil change interval,
you'd be checking for wear every 60 hours or less. Most stationary
equipment monitors once a week or less. So, you'd be over-sampling to at
least one practice. If you subscribe to the Fracture Mechanics theory of
failure then oil sampling should give you ample warning before a failure
becomes catastrophic.

For more information on oil analysis, see http://www.noria.com/
They are a bit suspect as an unbiased source since they provide oil
analysis training, but they do have an extensive on-line bookstore.

SAE has two papers available for sale on the topic of oil analysis for
gasoline engines.

http://www.sae.org/products/papers/981448.htm
http://www.sae.org/products/papers/1999-01-1515.htm

It shouldn't surprise anybody that the results were positive fro analysis -
but several of the "Standard" oil tests use on diesels were not of value.

Henry
 
You must log in or register to reply here.
Applied GMC
Banner Advertisement for gmcmi.com

Share this page

Share this page
Top Bottom
Back