Larger filter for a 2.5L Subaru Outback??

[deeter16317]

FYI...there are different Subaru filters...

I bought the 51356 as the larger filter...my car calls for the 51334. This picture explains everything...

 

[ThirdeYe]

Think it would be safe for me to use that 1356 on my Acura? It calls for the 1334 (like most Honda/Acura) and that's what I've been buying, but if the top filter is better I'll buy that next time and give it a shot.

 

[deeter16317]

Part Number: 51334
UPC Number: 765809513341
Principal Application: Acura (88-05), Chevrolet (85-88), Dodge (91-96), Ford (88-96), Honda (72-08), Hyundai (89-08), Isuzu (85-04), Kia (01-08), Mercury (87-91), Mitsubishi (89-98), Subaru (87-08) Atlas-Copco, Case, John Deere, Kobelco, Komatsu, Kubota, Onan, Toro & Yanmar Diesel, Other
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 3.194
Outer Diameter Top: 3.252
Outer Diameter Bottom: Closed
Thread Size: 20X1.5 MM
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=22/40
Burst Pressure-PSI: 280
Max Flow Rate: 9-11 GPM
Nominal Micron Rating: 19

Gasket Diameters
Number O.D. I.D. Thk.
Attached 2.475 2.173 0.233





Part Number: 51356
UPC Number: 765809513563
Principal Application: Acura (02-08), Chrysler Imports (92-06), Ford Probe (93-97), Honda (01-08), Infiniti/Nissan (96-08), Mazda (71-00), Mercury Villager (99-00), Mitsubishi (90-08), Saturn (04-07), Outboard Marine Engines, Various HD Equip.
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 3.402
Outer Diameter Top: 2.685
Outer Diameter Bottom: Closed
Thread Size: 20X1.5 MM
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=6/19
Burst Pressure-PSI: 363
Max Flow Rate: 9-11 GPM
Nominal Micron Rating: 19

Gasket Diameters
Number O.D. I.D. Thk.
Attached 2.475 2.173 0.233



Look pretty close to me...I ran the 51334 because it was physically larger (significantly)...

 

[ThirdeYe]

I don't understand how beta ratios work... does the 1356 filter better?

 

[deeter16317]

51334 is 50% @ 20 micron and slightly better than 95% @ 40 micron.

51356 is 50% @ 20 micron and slightly better than 80% @ 19 micron, which makes no sense to me how a smaller micron can have a better efficiency (multiple pass?).

This was taken straight from Fleetguard...Beta = 2 is 50%, Beta = 5 is 80%, and Beta = 20 is 95%.

They are both 19 micron nominal, so probably no significant difference.

 

[kwantam]

I've got an '05 WRX STi on which I've always run a Purolator PL14610. Purolator calls out the 14612 for this application, and the difference is only in the length of the filter. Without measuring I'd say the capacity is about 20% greater in the '10 than the '12.