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QuoteReplyTopic: Rehash. WC/WD oil filter Posted: 10 Feb 2026 at 10:40pm
Ricks Relics made a video showing how the filter material in the WC/WD filter from NAPA filter is sawdust. What did the original filter use for filtering material? Is anyone making an original filter??
My dad always called the filtering media "Excelsior" wadded up cotton; similar to packing in early railroad car bearing journals that required lubrication. R. Musgrave
Pleated paper oil filters were introduced in1946
by the Purolator company. While the first automotive oil filtration
system (using cloth) was invented by Ernest Sweetland and George H.
Greenhalgh in 1923, the industry shifted to pleated paper elements for
better efficiency following World War II.
Key details regarding the evolution of paper oil filters:
The Switch to Paper:
In 1946, Purolator introduced the pleated paper oil filter, moving away
from the earlier cloth-based, or "twill-weave" cloth, filtration
methods.
Adoption: While paper elements arrived in the 1940s, they became widely mainstream for passenger vehicles in the 1950s.
Further Innovation: In 1954, Wix Filters patented the "spin-on" oil filter, which refined the application of these paper elements.
Later Developments: By the 1960s, disposable, pleated, and vertical, pleated paper filters became the industry standard.
20 years ago WIX / NAPA had a problme with the filters being PAPER instead of COTTON... That was later fixed.. OK today... Where did you get the SAWDUST story ? I have not heard that yet ??
I have never had a problem with parts i bought from NAPA.... my problem with them is the PRICE.... Local Auto Zone or ON LINE purchases are normally much cheaper..
I have never had a problem with parts i bought from NAPA.... my problem with them is the PRICE.... Local Auto Zone or ON LINE purchases are normally much cheaper..
I saw this video on Facebook yesterday. He cuts open a NAPA 7011 bypass filter, and he claims it is filled with chaff.
With all the AI stuff, you can decide for yourself if it is real. I have used NAPA filters in the past (before their prices went crazy), but I have never cut one open.
QuoteReply Posted: 18 hours 50 minutes ago at 3:42pm
I changed oil last week, so i went a grabbed the filter out of the trash. This filter probably has 100 hours on it over the last 2 years.. The filter was PACKED TIGHT with cotton fiber and a few cotton seeds. This is not CLOTH, this is raw cotton taken from the field that still has seeds in it.. Did not fall out of the can, packed so tight you have to pick it out with a screw driver. I ground up a hand full with my fingers and layed it on the table....This seems to be acceptable.. I doubt everyone is making these filters. I would bet there is one factory in India or China making thousands of theses and selling them to WIX, FRAM and BALDWIN.. who paint them and redistribute to NAPA, CAR Quest and Farm Stores with what ever "brand name" you want..
the guy in WFs movie says these are "rice seeds"..... i dont know.... but the "material" seems to be cotton like..
Edited by steve(ill) - 18 hours 45 minutes ago at 3:47pm
QuoteReply Posted: 14 hours 35 minutes ago at 7:57pm
i bought my last napa filters last summer they got to expensive i cant even sell them at my jobber price let alone any jobber mark up cummins isx napa my cost 150.00 any were else 70.00
QuoteReply Posted: 4 hours 8 minutes ago at 6:24am
Years ago I read the filter media is Flax and the seeds are also from Flax. For the last several years I've been running my WC with a filter I modified so I can take it apart, wash it out, and repack the filter with Jumbo Cotton Balls from Walmart. Works great. Probably better than original. When I took apart the original filter and saw all the seeds inside, that's when I decided I can do a lot better for a lot less $. A cotton ball repack costs less than $2. I've put over 300 hours on my WC with cotton balls and all is great. I have an hour meter from Northern Tool on the WC, so the hours are for real. Oil pressure is the same as with the original Flax filter. The biggest challenge is making a removable perforated plate to retain the cotton balls in the filter housing. There's no way I'm paying $70 to $150 for an oil filter loaded with seeds that can get caught in my oil pump pick up screen or worse if the seeds circulate through the engine.
Edited by Phil48ACWC - 3 hours 7 minutes ago at 7:25am
QuoteReply Posted: 3 hours 13 minutes ago at 7:19am
HudCo wrote:
i bought my last napa filters last summer they got to expensive i cant even sell them at my jobber price let alone any jobber mark up cummins isx napa my cost 150.00 any were else 70.00
No more for NAPA for me either (and I use to buy a lot of stuff there).
An old friend works at our local NAPA. I stopped in to see him one day and thought I would pick up an oil filter for my Powerstroke. NAPA wanted over $60. I drove down the road to the Ford dealer and bought a Motorcraft filter for $24.
QuoteReply Posted: 2 hours 39 minutes ago at 7:53am
with respect to the seeds in the filter... The filter is PACKED TIGHT with cotton.. This restricts the INLET pressure which is backed up toward the pump to 15 psi.. The OUTLET of the filter is zero as it dumps to sump... Only 15% of the total oil flow goes thru the filter, so it is MINIMAL flow. The seeds are basically TRAPPED into compacted material. I dont see any way for them to get out . I have never seen a seed near the drain holes that are minimal diameter, or in the base, or in the oil pan.. You would never know the seeds were there unless you cut the filter open and pick thru the cotton.. Dont see this being a big problem.. Proobably been that way for years.......... the add above shows the filters being $11. at Auto Zone..... I think i looked on line 2 years ago and got the NAPA version for a similar price... No, im not paying $20. for a filter either... My opinion is they are all the same and just buy on PRICE when you need one.. Im only changing once every 2 years anyway.
Edited by steve(ill) - 2 hours 35 minutes ago at 7:57am
Years ago I read the filter media is Flax and the seeds are also from Flax. For the last several years I've been running my WC with a filter I modified so I can take it apart, wash it out, and repack the filter with Jumbo Cotton Balls from Walmart. Works great. Probably better than original. When I took apart the original filter and saw all the seeds inside, that's when I decided I can do a lot better for a lot less $. A cotton ball repack costs less than $2. I've put over 300 hours on my WC with cotton balls and all is great. I have an hour meter from Northern Tool on the WC, so the hours are for real. Oil pressure is the same as with the original Flax filter. The biggest challenge is making a removable perforated plate to retain the cotton balls in the filter housing. There's no way I'm paying $70 to $150 for an oil filter loaded with seeds that can get caught in my oil pump pick up screen or worse if the seeds circulate through the engine.
I like it! Did you perchance take any photos of your modification in progress?
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steve(ill) wrote:
Did you perchance take any photos of your modification in progress?