[Hacksaw]

Also, noted that the Napa 7712 filter has a micron rating of 21. Curious as to what the micron ratings on other filters may be.....

 

[Hacksaw]

I inquired to Amsoil about the bypass valve rating for their filter (Ea15K13) and they replied that it was 17 psid. They acknowledged it was a bit lower than Subaru standards to protect against dry starts. Does that make any sense?

 

[Virtus_Probi]

As I only have 2,000 miles on my new FXT, I still have some time before needing an oil change. So given a choice between the purchasing 4 of the black Tokyo Roki filters for $63 (including shipping) or buying the Napa 7712 filter for $7.26 each, which would you buy? The black filter does have more filter media (like about 28% more) which makes it a little more attractive to me. What say you?

NAPA told me that they no longer recommended the 7712 for the Forester, and I think the 7055 is somewhat bigger. As I think I mentioned before, I found the Wix 57055 (same as 7055) cheaper at an O'Reilly store.

 

[Virtus_Probi]

I inquired to Amsoil about the bypass valve rating for their filter (Ea15K13) and they replied that it was 17 psid. They acknowledged it was a bit lower than Subaru standards to protect against dry starts. Does that make any sense?

I thought the anti-drainback valve was what protected against dry starts?

 

[Hacksaw]

I thought the anti-drainback valve was what protected against dry starts?

Exactly! Which is why I asked if that statement made any sense. I'm surprised I got that kind of reply from Amsoil.

 

[Hacksaw]

Heard back from Amsoil. Below is a summary of the emails sent back and forth. I've deleted names/email addresses. I'm still not sure if I understand what they're saying about their filters.

From: "Mail TechService" <techservicemail@Amsoil.com>
To:
Sent: Thursday, December 3, 2015 7:37:24 AM
Subject: RE: Technical Service Contact Form - New Website


Our Ea15K13 is equipped with a Bypass valve setting at 17 psid, a bit less than the Subaru as this better protects against dry starts.

Thank you for contacting us. If you have further comments or concerns, please contact us again.

Technical Services

AMSOIL INC.

From:
Sent: Thursday, December 03, 2015 11:55 AM
To: Mail TechService
Subject: Re: Technical Service Contact Form - New Website


I thought the anti-drainback valve protects against dry-starts. I'm confused as to how a lower PSI setting adds to the protection.

From: "Mail TechService" <techservicemail@Amsoil.com>
To:
Sent: Monday, December 7, 2015 7:04:02 AM
Subject: RE: Technical Service Contact Form - New Website


You are correct in that the Bypass valve reduces the time it takes for oil to start circulating throughout the engine. But oil doesn’t circulate until the valve opens. This means that higher pressure must be attained before the valve opens, which means a longer delay in circulation if the Bypass valve is set at higher differential pressure. This is wjy we set the opening pressure lower than Subaru does with their filter.

Thank you for contacting us. If you have further comments or concerns, please contact us again.

Technical Services

AMSOIL INC.

From:
Sent: Monday, December 07, 2015 5:45 PM
To: Mail TechService
Subject: Re: Technical Service Contact Form - New Website


I'm confused even further. Is the Bypass valve and the Anti-Drain-back valve one in the same? All the cutaway diagrams of oil filters that I've ever seen were that they are two separate valves with one being located at the top of the filter and one at the bottom. Are Amsoil's filters constructed differently than others?

From: "Mail TechService" <techservicemail@Amsoil.com>
To:
Sent: Tuesday, December 8, 2015 7:46:52 AM
Subject: RE: Technical Service Contact Form - New Website

I can understand your confusion. The anti drain back valve prevents oil from draining out of the filter during shut down periods. This is important too.

The Bypass valve opens when there is a difference in pressure from the incoming oil side of the filter to the outgoing side of the filter. For instance, when you first start the engine, there is full oil pressure going into the filter, but no pressure on the out going side. This is one of the times when the bypass valve opens and allows oil to bypass the filter and this unfiltered oil to get to the engine components faster. How long this stays open depends on factors like oil temperature, its viscosity and the differential pressure setting of the bypass valve. It is beneficial for the valve to close soon so the oil is then filtered. A lower psid setting means the valve is closing sooner, thus oil is being filtered again.

Thank you for contacting us. If you have further comments or concerns, please contact us again.

Technical Services

AMSOIL INC.

 

[ScoobySnaXT]

Wix 57055 break down

WIX 57055

Specs:

OD: 68.2mm
Length: 65.4mm
Thread: M20x1.5, Roll-formed
Spring type: Coil
Bypass Valve: 27 PSID
Anti Drain Back Valve: Yes, Silicone
Media type: Cellulose 52 pleats
Media Surface area: 303.4cm2
Beta Ratio: 2/20=6/20
Flow Rate: 9 - 11 gpm
Gasket style: Square ring
Oil inlet hole/s area: Eight 6.25mm holes. 245.44mm2.
End caps: Metal
Can side thickness: .33mm

Observations:

- Holds a lot of oil in can from bypass for cold starts, and also has evidence of high pressure filtering from pleat fins being bent with oil in material

- 27 PSI Subaru psi anti by pass valve


This filters a lot of oil but due to the thickness of material it holds a lot of oil and this remains in the can.

Re-branded as the Napa Gold which is essential the same filter.

 

[Change_agent]

Does anyone know why the Foresters built before April 2011 are told to use the 15208AA130 filters and those built after April 2011 can you both the 15208AA130 and 15208AA160/15208AA15A?

I apologize if this has been asked before but read many of the oil filter threads and could not find out. (nor does my Service Manager who cannot get a straight answer out of Subaru) My 2011 when I got in May 2016 had 22,000kms (mostly sat in my father's garage).

 

[Change_agent]

I found the answer from Subaru Canada and I hope that it adds to the discussion.

"At the present time, when looking at the EPC, the 15208AA130 oil filter is catalogued as fitting the new BRZ as well as early 2011MY Forester non turbo engines. We have been advised that those early 2011MY Forester vehicles can actually use the less expensive 15208AA160 oil filter.

-15208AA130 has better filtering performance than 15208AA160.
-BRZ needs to have a better but more expensive filter because of high performance engine.
-15208AA160 is normal filtering performance but FHI found it’s good enough for 2.0L and 2.5L NA FB engines. Therefore, FHI superseded 15208AA130 to 15208AA160 to reduce service maintenance cost.
-FHI then superseded from 15208AA160 which is Japan sourced part to 15208AA15A which is US sourced part to reduce maintenance cost more.

As you can see, 15208AA130, 15208AA160 and 15208AA15A can be superseded each other so there is no problem to use any filters.

The new oil filter and old one are interchangeable, but for 2011 and 2012MY Foresters only. Other future products to use the new oil filter (PN 15208AA160) will not be interchangeable with the older filter (PN 15208AA130).




Sent from my iPad using Tapatalk

 

[subsha]

Few questions from http://www.subaruforester.org/vbulletin/f113/subaru-oil-filter-comparison-99130/
1) About 15208AA130: I am sure, that Media Surface areas is MORE than 1000cm2 (much more than surfaces of 15208aa160 and 15208aa170). Where did you get 608cm2 from? Look for example http://www.oil-club.ru/forum/topic/22915-subaru-oem-maslyanye-filtry/page-2#entry612948
2) About STI ST15208ST000 : Where did you get Bypass Valve 23 PSID from? I have heard information, that both STI synthetic oil filters have only 13 PSID (not 23-27 PSID as 80/100/130/160/170 filters)

 

[subsha]

List of founded biggest (like 15208aa130, not like 160 or 100) synthetic filters For Subaru FA/FB with round (not square) gasket style (better for high pressure then square style), made in one factory(?) of CHAMP LABS, every with 11-17PSI, 99%@25u, 98.7%@20u , some with different media:

1) Amsoil EA15K20,
2) Royal Purple 10-2808,
3) Mobil-1 M1-104,
4) K&N HP-1004,
5) Attention! Afepower 44-LF018 now without by-pass valve!

- and also some Purolator filters:
- One PL14459 (12-15PSI, 99.9%@20u), PL14620 (11-18PSI, 99.9%20u), PL14460 (20-25PSI, without ADBV), )
- Synthetic PSL14459 (12-15PSI, 99%@25u)
- Boss PBL 14461(>20PSI ?)

 

[subsha]

It is a pity that the author of thread left us...

 

[subsha]

Few questions from http://www.subaruforester.org/vbulletin/f113/subaru-oil-filter-comparison-99130/
1) About 15208AA130: I am sure, that Media Surface areas is MORE than 1000cm2 (much more than surfaces of 15208aa160 and 15208aa170). Where did you get 608cm2 from? Look for example Subaru OEM - ???????? ??????? - ???????? 2 - ???????? ??????? - ????? oil-club.ru
2) About STI ST15208ST000 : Where did you get Bypass Valve 23 PSID from? I have heard information, that both STI synthetic oil filters have only 13 PSID (not 23-27 PSID as 80/100/130/160/170 filters)

Is anybody at forum?

 

[Chucker]

@subsha - I think no one answered you because it wasn't clear you if were posting questions or commentary. The info on the 15208AA130 and ST15208ST000 filters were posted by member @AWDfreak who hasn't visited in the forum in eight months. @flstffxe is the moderator who compiled all of the info, so he may or may not have further data to provide on the filters in question.

 

[subsha]

Ok.
In attach - information about 130 filter: 1300cm2!!!

 

[OldGoat38]

IMO, the -130 filters are so superior to all others on the market, I don't understand why some do-it-yourselfers don't automatically use them.

Only $6.50 each when bought in bulk Subaru BRZ Oil Filters & Gaskets Case of 12 (Part No: 15208AA130 803916010)

 

[subsha]

IMO, the -130 filters are so superior to all others on the market, I don't understand why some do-it-yourselfers don't automatically use them.
[/url]

Because filtration efficiency of 100/130/160/170 is about 50%@20u.

 

[OldGoat38]

Because filtration efficiency of 100/130/160/170 is about 50%@20u.

Interesting. Is that a bad thing?

I really like the 201 sq. inches of filter media.

 

[Change_agent]

@subsha, the 23psi for the bypass filter is found in the data sheet you provided. All Subaru's require it...Perhaps if you look at WIx you will find both the efficiency and the correct bypass for Subaru. I use a WIX on the Impreza and because my 2011 Forester is a unicorn, which requires a 130 I use it . There is a hypothesis that because these oil pumps are pumping so much oil through the filter, what is important is flow rather filtration efficiency hence lower filtration efficiency but sufficent.


Sent from my iPad using Tapatalk

 

[subsha]

1) Subaru filter has 23PSI only in case of paper filters.
In case of synthetic filter resistance to the flow is less then a half(mostly 30%-50%) -= that's why bypass pressure may be 12PSI and even 9PSI.

2) About STI filters: it is not a paper filters, it's synthetic (potassium titanate fibers) filter:
Goggle translator said STI - SPORT PARTS - SUBARU BRZ�iZC6�j :
"Resistant to high temperatures, the potassium titanate fibers also capture fine particles of the carbonaceous such as a filter medium, and prepares the condition of the engine oil. Further, in order to suppress the filter paper deformation during high pressure, incorporating a pitch spacer net filter paper rear surface, and to stabilize the filtering function."