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Louvers VS Holes #5341386 02/04/20 10:26 PM
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BlueOvalFitter Offline OP
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Which flows oil better? I want to say holes but louvered filters seem to have more louvers than a filter with holes.


2007 F150, 4.2 V6
Havoline PRO DS 5W20, M1-209A
"One Filter, One OCI!"
"One Box, One OCI!"
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341388 02/04/20 10:27 PM
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bbhero Offline
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It's the holy war LOL


Nissan Altima 3.5 Coupe
Cam2 SuperproMax 5w30 Carquest r84356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341395 02/04/20 10:33 PM
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ZeeOSix Offline
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The one with the most area flows more. If louvers are barely opened up, then they won't flow as well. Always visually inspect louvers before buying. If louvers are opened up well, then there should be more flow area than the typical hole-y center tube

Re: Louvers VS Holes [Re: BlueOvalFitter] #5341407 02/04/20 10:53 PM
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slacktide_bitog Offline
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The ecore plastic cage banana

It seems that louvers are harder to make properly than holes. There are many filters posted on BITOG where the louvers aren't completely opened up.

Hastings/Baldwin is the only one that seems to know how to properly make a slotted center tube, but their louvers are formed differently.So the Hastings/Baldwin louvers are better than round holes, but most other louvers are inferior.

Re: Louvers VS Holes [Re: slacktide_bitog] #5341408 02/04/20 10:54 PM
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4WD Offline
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They way I fixed mine was to cut it open - remove the media - flip over the tube and look into the well opened louvers from the other direction.

F1215840-084F-4D80-A815-0554009F5325.jpegFECB3DC9-4DB2-48C7-BAAA-041324038FE8.jpeg
Last edited by 4WD; 02/04/20 11:00 PM.
Re: Louvers VS Holes [Re: bbhero] #5341455 02/05/20 12:33 AM
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BlueOvalFitter Offline OP
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Originally Posted by bbhero
It's the holy war LOL


Now this is a funny reply, unlike a sarcastic one.
crackmeup


2007 F150, 4.2 V6
Havoline PRO DS 5W20, M1-209A
"One Filter, One OCI!"
"One Box, One OCI!"
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341456 02/05/20 12:40 AM
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BlueOvalFitter Offline OP
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I had to go to WM earlier today to pick up some meds. I rode over into the filter section to look at a M1 209 and 211. There were no 211's. The 209A had louvers compared to the filter I cut open, which had holes. Also,, I couldn't tell if the 209A had a base end bypass. shrug.


2007 F150, 4.2 V6
Havoline PRO DS 5W20, M1-209A
"One Filter, One OCI!"
"One Box, One OCI!"
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341493 02/05/20 04:02 AM
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tig1 Offline
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2007 Ford Fusion 253,000 miles
M1 5-20HM
2017 Ford Fusion 86K
M1 0-20EP
10,000 mile OCIs on both engines
M1 ATF and M1 LV HP ATF
M1 10-30 in all OPE
MC filters

Re: Louvers VS Holes [Re: BlueOvalFitter] #5341495 02/05/20 04:12 AM
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dlundblad Offline
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I would argue they flow the same.

Use a quality brand and you’ll have no issues.


03 Jeep WJ 4.0 202k Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 195k M1 0w40 Mahle OX149D
97 Chvy Blazer 4.3 158k M1 EP 10w30 Supertech ST3980

Re: Louvers VS Holes [Re: dlundblad] #5341499 02/05/20 04:22 AM
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ZeeOSix Offline
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Originally Posted by dlundblad
I would argue they flow the same.


They will flow the same because of the PD oil pump.

But if louvers are closed up it can cause much more delta-p across the filter, which in turn can make the bypass valve open up. Ideally, you want a small delta-p as possible across the filter. When someone says it "flows better" when a PD pump is involved, it really means there's less delta-p due to flow.

Re: Louvers VS Holes [Re: BlueOvalFitter] #5341540 02/05/20 06:25 AM
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ofelas Offline
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Interesting thread.

Now you've got me curious about whether the Donaldsons I use have louvers or holes.


R12 in the summer, Webasto in the winter, and cassette tapes all year.
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341579 02/05/20 07:11 AM
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BMWTurboDzl Offline
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All else being equal,

Louvers = less turbulence = better flow ???


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Louvers VS Holes [Re: ZeeOSix] #5341581 02/05/20 07:15 AM
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BlueOvalFitter Offline OP
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Originally Posted by ZeeOSix
Originally Posted by dlundblad
I would argue they flow the same.


They will flow the same because of the PD oil pump.

But if louvers are closed up it can cause much more delta-p across the filter, which in turn can make the bypass valve open up. Ideally, you want a small delta-p as possible across the filter. When someone says it "flows better" when a PD pump is involved, it really means there's less delta-p due to flow.

But, how can you determine if the louvers are closed? I'm thinking an oil pressure gauge entering and leaving? But, how many people will have this set up? And, how many people stop to wonder if the louvers are closed? How many consumers know that an oil filter has louvers, holes, squares, triangles, etc., in an oil filter? shrug


2007 F150, 4.2 V6
Havoline PRO DS 5W20, M1-209A
"One Filter, One OCI!"
"One Box, One OCI!"
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341695 02/05/20 10:06 AM
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Virginia is for Louvers.


If you want the job done right......do it yourself.
Re: Louvers VS Holes [Re: BlueOvalFitter] #5341803 02/05/20 11:59 AM
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CT8 Offline
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Depending uppon the quality of the louvers the flow will be adequate.


2015 F150 2.7
2018 F350 6.2
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