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Fleetguard LF3681 Question #4558226
10/29/17 09:48 AM
10/29/17 09:48 AM
Joined: Jul 2017
Posts: 18
West Virginia
ChesterCopperpot Offline OP
ChesterCopperpot  Offline OP
Joined: Jul 2017
Posts: 18
West Virginia
Got one of these today and noticed that the "louvres" look almost closed. Does this seem right? Just want to get a consensus to determine if this is ok to use?

Thanks!



Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558253
10/29/17 10:13 AM
10/29/17 10:13 AM
Joined: Oct 2014
Posts: 11,857
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,857
Idaho
Return if in doubt.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558277
10/29/17 10:43 AM
10/29/17 10:43 AM
Joined: Mar 2004
Posts: 1,376
Flaherty, KY
92saturnsl2 Offline
92saturnsl2  Offline
Joined: Mar 2004
Posts: 1,376
Flaherty, KY
It's fine. I've seen this on the same China/Korea filter you have pictured, and on Hastings filters. Never had a problem on any of them.


1985 F-250HD 7.5L 4x4 135k- Maxlife 15w-40 HDEO
04 Odyssey EX 182k PUP 0w-40
96 Maxima GLE 250k QS Defy 5w-30
07 Chrysler Pacifica Limited 129k PUP 5w-40
Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558313
10/29/17 11:47 AM
10/29/17 11:47 AM
Joined: Jul 2009
Posts: 601
texas
danez_yoda Online content
danez_yoda  Online Content
Joined: Jul 2009
Posts: 601
texas
Second thought about the louvers. (deleted my first comment)

Has anyone ever added up the surface area of all those slits and calculated the pressure drop across them?

The slits look small but I bet the flow plenty since there are so many of them. Far less restrictive than the filter itself.

The slits should stay clean since the filter will catch anything that would plug them.














Last edited by danez_yoda; 10/29/17 11:52 AM.
Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558351
10/29/17 12:43 PM
10/29/17 12:43 PM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline
BlueOvalFitter  Offline
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
It's fine. Use it!

Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558490
10/29/17 03:25 PM
10/29/17 03:25 PM
Joined: Jul 2010
Posts: 18,736
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 18,736
PNW
Too closed up for my taste. Seen many examples of well formed louvers much wider opened than these.

Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558544
10/29/17 04:38 PM
10/29/17 04:38 PM
Joined: Oct 2009
Posts: 3,232
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,232
Wet side WA
Some people seem very upset with the louvres vs nice round holes. But what's the flow rate and is there really any significant restriction of flow since there seem to be many more of them?

Last edited by JohnnyJohnson; 10/29/17 04:38 PM.

2004 Corolla 124831
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558598
10/29/17 05:45 PM
10/29/17 05:45 PM
Joined: Oct 2015
Posts: 1,378
Houston, Texas
WellOiled Offline
WellOiled  Offline
Joined: Oct 2015
Posts: 1,378
Houston, Texas
I have always liked the idea of louvres. However, I have seen better formed louvres than what is posted here. I would want a little more opening. Thanks for the post.


2004 Ford Ranger 4.0L V6
Valvoline Advanced Full Synthetic 5W30 + Fram Tough Guard
Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558635
10/29/17 06:24 PM
10/29/17 06:24 PM
Joined: Jul 2017
Posts: 122
New England
Peter_480 Offline
Peter_480  Offline
Joined: Jul 2017
Posts: 122
New England
Purolator OEM?


'10 Ford E250 4.6L
'11 Ford Fusion 2.5L
Re: Fleetguard LF3681 Question [Re: Peter_480] #4558655
10/29/17 06:51 PM
10/29/17 06:51 PM
Joined: Jul 2017
Posts: 18
West Virginia
ChesterCopperpot Offline OP
ChesterCopperpot  Offline OP
Joined: Jul 2017
Posts: 18
West Virginia
I don't think its Puralator. It says "Made in Mexico" which was somewhat disappointing. It doesn't have the traditional date code to indicate Puralator.

Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4558973
10/30/17 06:48 AM
10/30/17 06:48 AM
Joined: Oct 2008
Posts: 12,471
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,471
The Old North State
Not aware who makes this FG, but overall construction pics, coo, and non Puro date code would indicate not Puro made. Recently another FG posted was made by Champ Labs. Don't think that's the case here though either.

As for louvers, your call. Seen more open ones, however also seen ones that didn't look open down the center tube and once media removed showed plenty of total opening area.

I'd say if in doubt or bothers you, take it back, use something else.

Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4559077
10/30/17 08:56 AM
10/30/17 08:56 AM
Joined: Dec 2010
Posts: 3,038
california
goodtimes Offline
goodtimes  Offline
Joined: Dec 2010
Posts: 3,038
california
There is another set of holes facing the other way. I cut open a Delco I was uncomfortable with, about like these louvers, and it was actually fine. Probably it is a judgement call. Here is a filter cut open that shows the narrow gap between can and element in the first two pictures. By eye the gap probably looks too small. When calculated it should be fine.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4555425/Fram_Ultra_XG7317_-_12,049_mil#Post4555425

Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4559101
10/30/17 09:21 AM
10/30/17 09:21 AM
Joined: Oct 2004
Posts: 3,079
Midwest, Illinois
beanoil Offline
beanoil  Offline
Joined: Oct 2004
Posts: 3,079
Midwest, Illinois
There is nothing wrong with that filter. I see about 60 visible louvers, give or take in pic1. A little less than 1/2 of the tube visible, so what, over 200 slits in the top half alone? Ever see how much fluid can escape a pinhole with 60 pounds of pressure on it?
I'm always surprised when folks question a leading filter manufacturer like FleetGuard. if there was a genereal problem with louvered center tubes, engines would by dying every day, all across the nation.
The Donaldson on my PSD has the same construction. I'm good with it.


beanoil: Tough under heat, real dirty afterwards.
Re: Fleetguard LF3681 Question [Re: ChesterCopperpot] #4559699
10/30/17 09:11 PM
10/30/17 09:11 PM
Joined: May 2012
Posts: 5,387
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,387
Fort Lauderdale, FL
I had the same doubt about a Purolator Boss center tube, but when I poured oil through it, it went through like a sieve. Under pressure, it would have been a deluge through it.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Fleetguard LF3681 Question [Re: beanoil] #4561572
11/01/17 08:26 PM
11/01/17 08:26 PM
Joined: Jul 2017
Posts: 18
West Virginia
ChesterCopperpot Offline OP
ChesterCopperpot  Offline OP
Joined: Jul 2017
Posts: 18
West Virginia
"beanoil", thanks for the input and advice. I'm not sure why your surprised when folks question things. This website/forum is full of questions about various topics. I'm sure its in the interest of gaining knowledge.

BTW, the "leading filter manufacturer like "FleetGuard" can't even validate the correct oil filter for my application. They keep telling me to use a different oil filter that clearly based on specifications will not work for my vehicle. I have provided all the data required within reason. Glad I questioned them....


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