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#4682728 - 03/02/18 08:38 PM Please Explain Why?
4ever4d Offline


Registered: 01/02/10
Posts: 953
Loc: North Carolina
The center tube on oil filters are, for the most part, corrugated or otherwise ribbed in some fashion. Why not just smooth with punched holes or louvers?
_________________________
04 Chevy Colorado 3.5 I5 5w-30 OEF
07 Honda Element 2.4 I4 5w-20 OEM
10 Nissan Rogue AWD 2.5 I4 5w-30 OEF
Amsoil Products & Fram or Wix Filters





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#4682730 - 03/02/18 08:41 PM Re: Please Explain Why? [Re: 4ever4d]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
the support, something I can think of
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#4682731 - 03/02/18 08:41 PM Re: Please Explain Why? [Re: 4ever4d]
mrsilv04 Offline


Registered: 12/08/06
Posts: 8275
Loc: Illinois
A smooth piece of metal with a bunch of holes in it is weak. Corrugate or rib it, and it gains strength back.
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#4682732 - 03/02/18 08:42 PM Re: Please Explain Why? [Re: 4ever4d]
4ever4d Offline


Registered: 01/02/10
Posts: 953
Loc: North Carolina
I never thought of it possibly being to add support to the core. Makes sense!
_________________________
04 Chevy Colorado 3.5 I5 5w-30 OEF
07 Honda Element 2.4 I4 5w-20 OEM
10 Nissan Rogue AWD 2.5 I4 5w-30 OEF
Amsoil Products & Fram or Wix Filters





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#4682745 - 03/02/18 08:58 PM Re: Please Explain Why? [Re: 4ever4d]
aquariuscsm Offline


Registered: 12/30/06
Posts: 18183
Loc: Dallas,Tx USA
My Nissan oem's have a smooth center tube,but it is really thick!!
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#4682746 - 03/02/18 08:58 PM Re: Please Explain Why? [Re: 4ever4d]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
Also, in some cases to reduce possible restriction to oil flow to the holes.

The center tube of the filter cap for my cartridge filter (theoretically serves the same purpose) is smooth, with no corrugations or ribs.
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#4682825 - 03/02/18 10:30 PM Re: Please Explain Why? [Re: 4ever4d]
69Torino Offline


Registered: 12/12/17
Posts: 242
Loc: Indy
The Mitsubishi 072 filters I have cut open have a smooth, non corrugated center tube. After cutting the filter apart, you can crush the center tube with your thumb and forefinger flat. The Kia 504 filters and all of the K&N filters I have cut open have a ribbed/corrugated tube. After separating those filters and attempting to crush the center tube, it is nearly impossible to crush them with both hands. So I have experience with this test and I can tell you the reason is definitely to add strength to the center tube, in which it does very well.
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#4682894 - 03/03/18 01:48 AM Re: Please Explain Why? [Re: mrsilv04]
jongies3 Offline


Registered: 03/11/16
Posts: 804
Loc: MT
Originally Posted By: mrsilv04
A smooth piece of metal with a bunch of holes in it is weak. Corrugate or rib it, and it gains strength back.

This
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2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM TG-3600 filter
1996 Ford Contour 2.5 V6 QSGB 5W-30, MC FL-500S filter

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#4683002 - 03/03/18 08:07 AM Re: Please Explain Why? [Re: 4ever4d]
MasterSolenoid Offline


Registered: 09/26/17
Posts: 168
Loc: One Step Beyond
Strength.
The same reason a metal garbage can has ribs running up & down it.

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#4683024 - 03/03/18 08:38 AM Re: Please Explain Why? [Re: 4ever4d]
goodtimes Offline


Registered: 12/08/10
Posts: 2864
Loc: california
Choosing a reputable maker helps. Like Toyota has a smooth tube. It goes hand in hand with the strength of the media pleating. A good maker tests the product and the buyer doesn't have to worry. I think the Fram Ultra could do fine with no center tube, the mesh is so strong. Usually when metal is corrugated to increase strength it is to allow thinner metal to be used.

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#4683059 - 03/03/18 09:31 AM Re: Please Explain Why? [Re: CR94]
Linctex Offline


Registered: 12/31/16
Posts: 6178
Loc: Waco, TX
Originally Posted By: CR94
Also, in some cases to reduce possible restriction to oil flow to the holes.


^^THIS^^

Notice when someone does a "cut and post" that the paper pleats of an element are always "crimped"?

If the paper pleats were flat, the oil pressure (which is a LOT of force, BTW)
would simply push the paper pleats flats against each other = NO FLOW

You must have lots of "peaks and valleys" so oil can flow to the next available pore.
.
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#4683181 - 03/03/18 12:10 PM Re: Please Explain Why? [Re: 4ever4d]
dlundblad Offline


Registered: 09/30/13
Posts: 10061
Loc: Indiana
Originally Posted By: 4ever4d
The center tube on oil filters are, for the most part, corrugated or otherwise ribbed in some fashion. Why not just smooth with punched holes or louvers?


Fram and (some) older style WIX filters for example have smooth and punched holes in the center tube.
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