Undersized Ford 4.6 filters

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I learned something new today. Doing the first change on my sons 2001 Grand Marquis, I had a MC 820 on hand ready to go. Then I saw a small filter on the underside of the engine. Confused, I did a net search, and found this:

http://www.f150forum.com/f6/oil-filter-question-190022/ (see pics)

Apparently quick lube places will sometimes use undersized filters for the 4.6's, but the 820 IS correct.

Maybe this is common knowledge to many here, but it was a surprise to me.
 
Originally Posted By: gfh77665
the 820 IS correct.
The MC FL820S is not only correct, it's the best value-for-money for a Ford modular motor...
 
Most oil change places you will find the smaller filter...same thing just smaller and if it means less to stock the better....do i like it no...its just a space thing on certain applications but its the same engines so i wouldnt worry much..i bought a used 07 f150 5.4 about a month ago...opened hood and it had the little one on it..less than 20 miles on it going by the window sticker....kinda cringed but its still on it and i sleep at night....its a pz-173..think the newer cross is a fl-500...
 
Yeah they do that so they don't have to stock as many filters. They whittle their filter stock down to bare minimum, using the smallest filter in a given filter series for everything.
 
If you have a Thunderbird with the 4.6, that smaller filter might be a better choice. The FL820S was a bear to get in and out of there in that car.
 
Ran into that when I bought my used 04 F150 with the 5.4. Had the PZ-173 on it. A trick by the oil change places to reduce their needed inventory.

How having the FL-820s size wouldn't make sense is beyond me - not like its an uncommon filter, but what do I know...
 
Originally Posted By: MNgopher
Ran into that when I bought my used 04 F150 with the 5.4. Had the PZ-173 on it. A trick by the oil change places to reduce their needed inventory.

How having the FL-820s size wouldn't make sense is beyond me - not like its an uncommon filter, but what do I know...


How many non Ford vehicles actually spec the equivalent of the FL820S to make a small universal fit filter worthwhile. I think it's that the small filters can be installed in Ford's tight filter area faster than the FL820S can. Time is money to quick lube places. And less media is usually less expensive, more money saved. If you can't do it yourself bring it to a facility that will use your supplied oil and filter or go to the Ford dealer, they're usually cheaper compared to fast lube places.

Whimsey
 
According to Fram, the FL820s crosses to these:

Competitor Cross Reference
Competitor Name Competitor Part
AC-DELCO PF1250
AC-DELCO PF1250CL
AC-DELCO PF1250FCL
AC-DELCO PF26
ALLIANCE ABP/N10G-LF3681
AMSOIL ASF11
AMSOIL EAO11
ATLAS F-20
AUTOEDGE AL2
Autolite for Oil FIlters AL2
AUTOPAR FE336
BALDWIN B329
BIG A 92372
BOSCH 3410
BOSCH 72212
CAM2 C4651
CANADIAN TIRE 17-1738-2
CARCARE IOF2
CARQUEST 84899
CARQUEST 85372
CARQUEST B4651
CASITE CF110
CASTROL CAS2
CENEX CO820
CHAMP PH26
CHAMP PH820
CHRYSLER 4884899AB
CHRYSLER 5038041AA
CITGO C4651
CROSLAND 2010
DEFENSE DL2
DELPHI FX1008
DENSO 150-1014
DEUTSCH D407
DONALDSON P550965
ECONO LUBE L24651
EVERGARD E4651
FILTERS INCORPORATED OF2
FIRESTONE TF4651
FIRESTONE TF-4651
FLAG C-2
FLEETGUARD LF16002
FLEETGUARD LF16214
FLEETGUARD LF3681
Flying F PH2AZ
FORD F1AZ-6731-A
FORD F1AZ-6731-BD
FORD FL 820
GENERAL MOTORS 19160693
GENERAL MOTORS 19160696
GENERAL MOTORS 89017527
GONHER GP68
GOODYEAR L4651
GRAND PRIX PH820
GREASE MONKEY GM24651
GREASE MONKEY GM4651
GROUP 7 V4651
HASTINGS B329
HASTINGS LF110
HASTINGS LF110F
HASTINGS LF612
HAVOLINE T-36
HENGST H10W18
JIFFY LUBE HL2
JIFFY LUBE JL4651
JIFFY LUBE L24651
K & N HP-2010
KENDALL K29
KRALINATOR L320
LEE LF-820
LUBER-FINER PH26
LUBER-FINER PH820
MANN & HUMMEL ML 1006
MANN & HUMMEL W920/16
MAZDA AJ04-14-302B
MAZDA AJ57-14-302
MAZDA AJTM-14-302
MAZDA GY01-14-302B
MECHANICS CIRCLE MOF 2
MERCURY 35-877761K01
MICROGARD MGL2
MIGHTY M4651
MILEGUARD MO2
MOBIL M1-210
MOBIL MO4651
MOPAR FE00336
MOPAR MO-899
MOTOR TREND ML2
MOTORCRAFT FL 820
MOTORCRAFT FL 820S
NAPA 1372
NAPA 7899
PARTS MASTER 61372
PARTS MASTER 67899
PARTS PLUS PH820
PENNZOIL PZ-42
PERFORMAX PO-42
PERFORMAX PO-42
PHILLIPS 66 PO1372
POWER FLO SL24651
PRO/GAUGE PGO-4651
PROMOTIVE PH2500
PRONTO PO-2
PRO-TEC 159
PUROLATOR L24651
QUAKER STATE QS2
ROCKHILL 61372
ROVER 4137784
SECURITY SO-820
SERVICE 1 OF4651
SERVICE PRO M4651
SHELL SH36
SILVERLINE 21372
STP S2
SUNOCO O-35
SUPERTECH ST2
TRUST PH820
UNOCAL PF820
VALVOLINE VO105
VALVOLINE VO47
WALMI WS-2
WARNER PH820
WIX 51372
WIX 57063
WIX 57899
 
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