Motorcraft FL-910S vs FL-400S

[Matt_V]

I just recently changed the oil of my 2016 Fiesta ST, which uses an FL-910S filter and put in an FL-400S filter for the slightly larger capacity.

I found these specs on the filters:

FL-400 Specifications:
Thread Inside Diameter (in.): 3/4"-16
Outside Diameter Top (in.): 2.98"
Outside Diameter Bottom (in.): 2.98"
Length (in.): 4.14"
Spin-On Filter: Yes
Bypass Valve: YES
Color: White
Burst Pressure (PSI): 250 psi
Pressure Relief Valve: YES
PSI Relief: 20 PSI
Micron Rating: 80%@20um
Height (in.): 4.14"
Seal Outside Diameter (in.): 2.75"
Seal Inside Diameter (in.): 2.40"
Anti-drainback Valve: YES

FL-910S Specifcations:
Thread Inside Diameter (in.):3/4"-16
Outside Diameter Top (in.):3.15"
Outside Diameter Bottom (in.):3.15"
Length (in.): 3.36"
Spin-On Filter:Yes
Bypass Valve:YES
Color:White
Burst Pressure (PSI): 250 PSI
Pressure Relief Valve:YES
PSI Relief:14.5 PSI
Micron Rating:50%@35um
Height (in.):3.36"
Seal Outside Diameter (in.): 2.75"
Seal Inside Diameter (in.): 2.40"
Anti-drainback Valve:YES

The biggest difference seems to be the pressure relief valve PSI which is slightly higher on the FL-400S. Can someone explain what the pressure relief valve does and if the higher PSI rating is good or bad? I like the 400S because it gives an extra half quart of oil capacity but there seems to be some debate about whether or not it actually hurts or benefits.

 

[53' Stude]

Dunno about the bypass stuff but I'm running a FL-400S in the Camry in my sig. I'd be more worried about clearance with using a FL-400S but it's your car

I'd personally stick with the FL-400S

 

[KD0AXS]

Really they can be used interchangeably as long as you have room for the extra length. I always used the 400S when I had a Saturn because the extra length made it easier to remove and install. I'm now running a 400S on my John Deere garden tractor.

 

[daman]

The higher the PR setting the less time it goes into bypass(letting unfiltered oil back into the engine). More oil will be forced through the media.

I always like running a higher BP setting filter.

 

[RF Overlord]

Originally Posted By: Matt_V
FL-400 Specifications:
Micron Rating: 80%@20um

FL-910S Specifcations:
Micron Rating: 50%@35um

Pretty big difference if you ask me...

 

[69GTX]

Originally Posted By: RF Overlord
Originally Posted By: Matt_V
FL-400 Specifications:
Micron Rating: 80%@20um

FL-910S Specifcations:
Micron Rating: 50%@35um

Pretty big difference if you ask me...


Agree. Not even comparable.

 

[SirTanon]

The 2010 Fusion in my sig specs the FL910s, but I've been running the FL400s since I got it, with the exception of my current OCI, which has a Fram Ultra 3614 (the Fram Ultra equivalent of the 910s. Never had a single problem with any of the 400s filters that I've run, and I've cut open quite a few. Also ran UOAs on many runs, and they've always been stellar.

As others have mentioned, as long as there's room/clearance for the longer filter, you should be fine with the 400s.

 

[Matt_V]

Originally Posted By: 69GTX
Originally Posted By: RF Overlord
Originally Posted By: Matt_V
FL-400 Specifications:
Micron Rating: 80%@20um

FL-910S Specifcations:
Micron Rating: 50%@35um

Pretty big difference if you ask me...


Agree. Not even comparable.


Forgive me for my ignorance, still relatively new to this. The FL-400S has a better micron rating?

 

[ZeeOSix]

Originally Posted By: Matt_V
I just recently changed the oil of my 2016 Fiesta ST, which uses an FL-910S filter and put in an FL-400S filter for the slightly larger capacity.


Where did you find these specs that include the filtering efficiency? Link?

 

[ZeeOSix]

Originally Posted By: Matt_V
Originally Posted By: 69GTX
Originally Posted By: RF Overlord
Originally Posted By: Matt_V
FL-400 Specifications:
Micron Rating: 80%@20um

FL-910S Specifcations:
Micron Rating: 50%@35um

Pretty big difference if you ask me...


Agree. Not even comparable.


Forgive me for my ignorance, still relatively new to this. The FL-400S has a better micron rating?


Definitely ... filtering 80% of the particles 20 microns or larger is much better than filtering 50% of the particles 35 microns or larger.

 

[Matt_V]

Originally Posted By: ZeeOSix
Originally Posted By: Matt_V
I just recently changed the oil of my 2016 Fiesta ST, which uses an FL-910S filter and put in an FL-400S filter for the slightly larger capacity.


Where did you find these specs that include the filtering efficiency? Link?


A member of the FiestaST forum I am on posted these specs.

http://www.fiestastforum.com/forum/threa...ull=1#post93440

 

[ZeeOSix]

Originally Posted By: Matt_V
Originally Posted By: ZeeOSix
Originally Posted By: Matt_V
I just recently changed the oil of my 2016 Fiesta ST, which uses an FL-910S filter and put in an FL-400S filter for the slightly larger capacity.


Where did you find these specs that include the filtering efficiency? Link?


A member of the FiestaST forum I am on posted these specs.

http://www.fiestastforum.com/forum/threa...ull=1#post93440


I see in the FiestaST forum post that the info was from Advanced Auto. If you click on those links now, there is only a few lines of specs, and nowhere near the information he found 1-1/2 years ago.

 

[Matt_V]

That's strange then, not quite sure where he found it then?

-Matt

 

[ZeeOSix]

Originally Posted By: Matt_V
That's strange then, not quite sure where he found it then?

-Matt


I assuming that 1-1/2 years ago, all that spec info was shown on the Advance Auto website for those two Motorcraft oil filters.

 

[69GTX]

The filtering specs could be bogus on that FL910S. You would think that 80% at 20uc would be the min spec for any quality MC filter.

 

[Matt_V]

I'm wondering if the FL-400S specs are also correct, because this site shows a different pressure relief spec.

http://www.filtertopia.com/filters/MOTORCRAFT /FL 400S.htm

 

[Garak]

Originally Posted By: 69GTX
You would think that 80% at 20uc would be the min spec for any quality MC filter.

I think that's actually what it was when the Motorcraft site used to list nominal specs.