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#492950 - 09/22/04 07:07 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
edwardh1 Offline


Registered: 01/17/03
Posts: 3035
Loc: Coastal South Carolina
one of the best seems to be the "no brand"
what was it?

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#492951 - 09/22/04 10:46 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Bill Plock Offline


Registered: 01/11/03
Posts: 335
Loc: Owego, NY
quote:
Originally posted by edwardh1:
one of the best seems to be the "no brand"
what was it?

We're not sure of the brand ... IIRC one of the guys had bought a quantity of surplus filters that were designed for the gas trucks and donated one for the test. It was the same size as the diesel version but had less pleats. (The duramax air box is the same size as the gas trucks but the diesel filter is heavier and has more pleats).

[Smile]

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#492952 - 09/25/04 02:48 AM Re: ISO 5011/SAE J726 test of Duramax Air Filters
RedWolf4000 Offline


Registered: 05/31/04
Posts: 243
Loc: NY
Probablly a FRAM! Wouldnt that be funny? These results still dont suprise me in any way. When i look at an AC DELCO for my car i can see that its the best choice. It has the most pleats, a really wide seal and it fits in the air box so tighly compared to others. They have a great oil filter too! GM uses a good supplier.

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#492953 - 09/30/04 12:19 AM Re: ISO 5011/SAE J726 test of Duramax Air Filters
1sttruck Offline


Registered: 03/20/04
Posts: 4378
Loc: Camas, WA
Air filters for the Dodges from Cummins are around $15. I'm looking at trying to use a large oiled foam filter as a pre filter for the stock paper filters, as the paper filters do end up with lots of dirt caked on them. The newer ones have a layer of foam on top of the pleats, which is nice as without the foam the filter area was defeated by the layer of crud.

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#492954 - 10/17/04 10:00 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
SPICER Offline


Registered: 10/16/04
Posts: 47
Loc: Milwaukee
Hello members. My name is Arlen Spicer and I am the one who "orchestrated" this air filter study. Most everything you need to know about me, the study and why I did it is in the final study on dieselplace.com.

I joined this forum because I have gotten a lot out of bobistheoilguy.com in terms of useful information. In fact, the air filter study done by a member and published here inspired my study. I am here for you to ask any questions you would like. SPICER

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#492955 - 02/27/06 10:39 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Killerbees Offline


Registered: 12/12/05
Posts: 79
Loc: Arizona
One year later, not a single question for Spicer?

This study is the most illuminating piece of fact separating marketing fiction, to have come along in the automotive world since electronic ignition. I would just love to have 1% of KN's marketing budget.

If there is one conclusion you should draw, it is this: There are companies that will spend an awful lot of money to convince you to buy something you don't need, and can't benefit from.

...and yes, my sceptical friends, dirt shortens engine life. But worse, $300 for that priviledge is a bit too much to pay. [Smile]

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#492956 - 02/28/06 01:27 AM Re: ISO 5011/SAE J726 test of Duramax Air Filters
TomH Offline


Registered: 10/08/04
Posts: 391
Loc: Richmond, VA
$300 for a K&N filter?!?!?! I hope that's just a typo as I've never seen a K&N air filter for an automotive application cost even half of that.

You want a company that likes to spend money convincing you to buy unnecessary/worthless products? Ever heard of something called the Tornado?

And I still like my K&N cone filter just fine, no matter how many "tests" on them I read.

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#492957 - 04/02/06 11:41 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Joseph Fihn Offline


Registered: 03/05/05
Posts: 105
Loc: Phoenix, AZ.
Regarding the AC-Delco Air filters for the Duramax application, where can you buy them most reasonably (checking for a Duramax buddy)?

Does anyone know if they make an AC-Delco A/F for an '03 Dodge/Cummins?

Thanks.

Joe Fihn

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#492958 - 04/05/06 11:36 AM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Rand Offline


Registered: 08/20/03
Posts: 12804
Loc: NE,Ohio
Well this is quite the old topic but since it was
ressurected I do have a couple questions..

In the test was the NEW amsoil filter an
Amsoil EA filter?

Did anyone else notice the graph for
dirt passed vs time was out of wack..
it added the dirt passed in grams to the
time of test in minutes...

IE the 20min amsoil test was 23 on the graph
because it passed 2.73g of dirt..
the 24min K&N test was 31min on the graph
because it passed 7g of dirt...

Also since the ac delco had 6+ restriction
it was tested out to 16+ restriction
while the K&N was only tested out to 14+ restriction... hardly seems fair.

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#492959 - 04/06/06 02:46 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Bill Plock Offline


Registered: 01/11/03
Posts: 335
Loc: Owego, NY
Joe,

I just bought some AC A1618C air filiters for my Duramax from DieselFiltersOnLine . Their price+shipping was the lowest I found. I bough the last batch from www.Gmpartsdirect.com (their price is good but shipping is high)

Also, I don't have any info on AC filters for the Dodge
----------------------------------------------------------------------------------


Rand,

Answers to your questions & comments are as follows:

quote:
In the test was the NEW amsoil filter an Amsoil EA filter?
No, the new AMSOIL filter had not yet been introduced at the time of the test.

quote:
Did anyone else notice the graph for dirt passed vs time was out of wack.. it added the dirt passed in grams to the time of test in minutes..
You are correct, the scale at the left of the graph it is adding the two values - total grams of dirt passed and time to restriction. However the point of the stacked column graph is to show the relative differences between the various filters in terms of dirt loading and time to max restriction.. (I should probably edit the file to remove the 0-60 on the scale since it's not relevant. There are a few other grammatical errors I've meaning to correct as well.)

quote:
Also since the ac delco had 6+ restriction it was tested out to 16+ restriction while the K&N was only tested out to 14+ restriction... hardly seems fair.
This was a completely objective, standardized test with no agenda to make one filter look better than another.

Quoting From the report,

"The Capacity and Efficiency test report presents the test results of feeding an initially clean filter with PTI Course Test Dust (dirt) at a constant rate and airflow. The course test dust has a specific distribution of particle sizes ranging from less than 2.5 microns to greater than 80 microns (see table below). Every filter is initially tested at 350 CFM and the Initial Restriction or differential pressure across the filter is recorded in IN-H20 (Inches of Water). The filter is then tested by feeding test dust at a nominal rate of 9.8 grams per minute with a constant airflow of 350 CFM. The test is continued until the flow restriction exceeds the Initial Restriction + 10 IN-H20. At this point the test is terminated and the amount dust passed through the filter - Accumulative Gain - is measured."

So, the test is stopped when the restriction reaches the initial restriction + 10 IN-H20. Initial restriction for the K&N was 4.54 while the AC was 6.23. Hence, the AC was stopped at 16.23 and the K&N at 14.54.

[Smile]

[ April 07, 2006, 05:57 AM: Message edited by: Bill Plock ]

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#492960 - 07/23/06 03:35 AM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Bill Plock Offline


Registered: 01/11/03
Posts: 335
Loc: Owego, NY

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#492961 - 08/02/06 07:45 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
FleetFilter.com Offline


Registered: 07/06/06
Posts: 128
Loc: Brenham, Texas
We are cheapest on WIX/ NG filters

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#492962 - 08/07/06 07:06 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Rio Offline


Registered: 08/07/06
Posts: 2
Loc: Maryland
Just to bring this valuable thread up to date:

The original Amsoil filter used for this test in 2004 was most likely the Wix regular paper filter they resell.
They now have new patented nanotechnology paper filter, which offers much better flow and filtering performance then any filter listed here.
Please see the site below for technical details:
https://www.amsoil.com/lit/databulle...75_rev2_06.pdf

I am switching away from oil coated filters and found this thread most useful to confirm my findings about paper filters better filtering performance than gause coated counterparts.

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#492963 - 08/07/06 07:11 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Rio Offline


Registered: 08/07/06
Posts: 2
Loc: Maryland
sorry gius the site address above had a typo,
the correct one is:
https://www.amsoil.com/lit/databulletins/g2175_rev2_06.pdf

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#492964 - 08/07/06 08:58 PM Re: ISO 5011/SAE J726 test of Duramax Air Filters
Bill Plock Offline


Registered: 01/11/03
Posts: 335
Loc: Owego, NY
The AMSOIL filter used in the test was a TS123 oiled-foam style filter .. [Smile]

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