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Old 08-31-2001, 02:11 AM   #26
P.K. Motorsports
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I'm not sure what the concern is over the valving being "different". The anti-drainback valve is not a complicated item. It is just a one-way valve. Its sole purpose is to prevent the oil from draining back (in the reverse direction from the oil flow when the engine is running) from the galleries past the filter and back out into the oil pan. That's all. The design doesn't matter - there are only two stati for an anti-drainback valve: either it works, or it doesn't.

I cannot believe the '00s have a distinct part number from the '99s. Everything about the oil delivery system is the same, most notably the physical mounting to the block. A 3310 will work fine on the '00- RS.

As for bigger filters being closer to the header... A lot of Hondas and Nissans have the filter on the back of the engine, tucked up above exhaust parts and below the intake manifold, where there will be no airflow whatsoever. The filter on the EJ25 hangs down into moving air. Still, consider that you can hold your hand 3" away from the exhaust primaries when the engine is hot and feel warmth. On the other hand, if you touch the hot engine oil it will burn you. I REALLY doubt that a filter which closes the gap with the exhaust by .25" would be measurably hotter on one side than the other, because the radiant heat from the exhaust is a drop in the bucket compared to the heat of the oil. But even if it were, the overall temp would still be lower due to a larger surface area exposed to the air.

That said, I think a 3" filter is plenty large in diameter. I would indeed be interested if anyone knows of a quality filter with the correct threads and gasket diameter which is 3.5" long.
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Old 08-31-2001, 03:16 AM   #27
subysouth
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Default Sorry guys

I just dont know your part numbers. Ive got a 2.2L Legacy and the Bosch oil filter for my car is 3310. If you have an EJ22 this is probably your filter as well(Impreza or Legacy.) The 2.5L motors I just dont know. Check AutoZone-they help me a great deal.
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Old 08-31-2001, 03:48 AM   #28
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per this thread I just changed my oil with Mobil1 oil and a Mobil1 Filter and I could not be happier

also threw a fumoto valve on.
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Old 08-31-2001, 11:27 AM   #29
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So did you observe the minimal thread engagement on that Mobil1 filter, as Pat spoke of?

Or did you not notice that part of the discussion, thus the reason you're happy?
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Old 08-31-2001, 11:51 AM   #30
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PK-

It's not the drainback valve people are talking about (which really wouldn't matter because of the filter orientation) It's the Bypass valve which is specific to each vehicle and application. this valve opens when the filter becomes clogged so as not to starve the engine of oil. Depending on the oil pressure in your car a lighter valve (than stock) could allow constant bypassing of the filter or a heavier valve could never open until the engine is already starved for oil.

BTW the Purone uses synthetic filtering media and a better ring seal and in all other respects is exactly to factory specifications.
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Old 01-23-2002, 10:39 AM   #31
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I am a long time Amsoil filter user and now a dealer. The oil filter part # is SDF20 for ALL models and engines of Subaru from 1997 to 2000 (at least, since that is what my wife and I have). If you have different years, you can call or e-mail them (or me) for confirmation. The bi-pass valve needs to activate at the correct pressure to avoid engine damage. Amsoil's does. Amsoil filters exceed the capacity AND filtration cababilities of Mobil 1, WIX, FRAM, AC, Purolator, NAPA and the now discontinued HardDriver. The micron bi-pass filter (used in addition to a SDF filter) is in a class by itself.

PRODUCT DESCRIPTION
The AMSOIL Super Duty Oil Filter (SDF) is designed to provide maximum filtration while meeting the high flow demands of modern automobiles. The AMSOIL SDF contains a special cellulose, synthetic and glass blend media that offers the best possible balance of long life, high capacity and overall efficiency.

Traps Dirt Throughout Media Thickness
The AMSOIL SDF has a lofted fiber depth-type media that traps dirt throughout its entire thickness for exceptional filtering efficiency. It keeps oil clean and free of wear-causing contaminants. The AMSOIL SDF Oil Filter provides up to 100 percent more capacity and up to 20 percent greater efficiency than other filters provide. It is ideal for use with extended oil drain intervals.

Built for Rugged Performance
The AMSOIL SDF has a heavy-duty case of drawn steel. The case is double-crimped at the base with rolled-under seaming to withstand extreme pressure surges and road shocks.

Assures Oil Flow with Relief Valve
On most filters a relief valve is provided to assure ample oil flow. It prevents oil starvation in the engine in the event the media becomes saturated.

Prevents Oil Drainage During Engine Shutdown
On filter installations where the mounting is sideways or upright, dirty oil could drain out of the filter when the engine is shut off. The AMSOIL SDF has an anti-drainback valve that keeps trapped contaminants in the filter when the engine is not running.

APPLICATION
AMSOIL INC. recommends changing the AMSOIL SDF according to the following guidelines.

In gasoline-fueled engines using any AMSOIL motor oil except AMSOIL XL-7500 Synthetic Motor Oil, change the filter at 12,500-mile or six-month intervals. In gasoline-fueled engines using AMSOIL XL-7500 Synthetic Motor Oil, change the filter at 7,500-mile or six-month intervals. If a Hastings or other filter is used, filter should be changed at manufacturer recommendations.

When using an AMSOIL Oil Filter with conventional motor oils, refer to the owner's manual for the recommended oil filter change interval.

mrecknagel@wi.rr.com
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Old 01-07-2006, 01:23 PM   #32
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I revived this thread because I thought I had discovered something new and exciting, when in fact it's already been discussed. Living in HI for the past 3 years I've been deprived of Autozone (where I used to buy Bosch filters), so I've been using the NAPA Gold (#1334). Last week I picked up a Bosch 3110 at Autozone here in CT. When I changed my oil and pulled off the NAPA 1334 I was surprised at the size difference. Looking a bit more closely, I noticed that the NAPA filter's end plate is slightly concave, so that the threads probably sit about 1/16"-1/8" or so below the filter O-ring. The Bosch 3110 (which is the same size/shape as OEM as far as I can see) has the threads nearly flush with the O-ring. I've been using the NAPA Gold filter for 3 years now, and although the threads aren't as high as the OEM filter, the thread engagement is more than sufficient.

I went back to Autozone and confirmed that the Mobil1 M304 has the threads even deeper - probably 1/4" or maybe even more - below the filter O-ring. I tried one of those out years ago (as I said 3 or 4 years ago in this thread! ) and only got 1 or 1-1/2 turns on the threads before the O-ring was against the engine block. Not good.

One additional bit of info. The same day I changed my oil I crawled under my Dad's '01 Outback wagon to find where it was leaking oil. His car has a filter on it that I've never seen before - longer and thinner than the little squatty ones I'm used to. It says "Fuji Heavy Industries" and "Genuine Part" on it (along with a bunch of Japanese writing) but I didn't see a Subaru emblem on it. It's possible that I just didn't wriggle around enough under there to find it the "Subaru" name on it. Or maybe it doesn't say Subaru on it. That made me wonder if it's some sort of generic FHI filter. I know Ford makes 2 different "grades" of parts - Motorcraft and FRPP (Ford Racing) - maybe Subaru and FHI do the same? Or maybe Subaru has shifted over to using filters made by its parent company rather than by Purolator? Does anybody know? Anyone have a newer Subie that can measure the OEM filter?

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 01-08-2006, 05:45 AM   #33
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I used a K&N oil filter, and its so much easier to replace when it comes time to change oil and filter. I hate using an oil filter cap wrench or w/e u call it with the K&N I just use a socket
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Old 01-08-2006, 11:01 AM   #34
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Well, really, if you put the filter on correctly, you should be able to take it off by hand. But the little socket thing on the filter is a nice touch.

Pat
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Old 01-08-2006, 01:33 PM   #35
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Quote:
Originally Posted by Patrick Olsen
Well, really, if you put the filter on correctly, you should be able to take it off by hand.
Pat
Actually, the ONLY time I need a tool to remove an oil filter is when someone else replaced it last.
Either they overtorque it, or they didn't put oil on the seal prior to installing it.
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Old 01-08-2006, 04:10 PM   #36
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WHY NOT USE A REMOTE FILTER AND USE AN HP1 BY FRAM OR EQUIVEANT. (SORRY FOR THE CAPS). The filter holds a qut by itself and has more suface area than two stockers.
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Old 01-08-2006, 08:38 PM   #37
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Just changed the oil on my Dad's Outback, as it seemed to be leaking from the filter. Filter seemed to be on there tight, so I dunno why it was a problem - we'll see if a new filter fixes the problem. Anyway, I had mentioned above it was a different filter than I'd seen before. It turns out it does say Subaru on it, I just hadn't seen it the other night. The filter is very narrow - basically, the O-ring is just inside the outer diameter of the thing - probably about 1/2" more narrow than the Bosch 3110 (which I believe is the same size as OEM). It's about 1/4-1/2" taller than the 3110. The O-ring is pretty narrow, which probably shouldn't cause any problems, but I dunno. I don't like it!

Quote:
Originally Posted by J.JOHNSON
WHY NOT USE A REMOTE FILTER AND USE AN HP1 BY FRAM OR EQUIVEANT. (SORRY FOR THE CAPS). The filter holds a qut by itself and has more suface area than two stockers.
I wouldn't add all that plumbing just for the sake of using a different filter. Maybe if I was going to be plumbing in an external oil cooler I'd think about it. I really don't think there's any need for a bigger filter - if Subaru's fine using a little filter on their 300hp, turbo'd 2.5L, then I'm sure my non-turbo making 100hp less is fine, too. However, if I can use a slightly larger filter in place of the little OEM one, then I figure it can't hurt to do so.

Oh, and one other bit of data... I didn't get any model year info, but apparently the NAPA Gold 1334 is used on lots of Japanese cars. The guy at NAPA specifically mentioned Accords. With that being the case, there may be other options (Mobil1, for instance) spec'd to fit Accords that would also work for us.

Pat

Last edited by Patrick Olsen; 01-08-2006 at 08:43 PM.
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Old 01-08-2006, 11:32 PM   #38
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I just changed the original filter on my 06 and replaced it with a Napa gold, the Napa filter is slightly smaller diameter and has a flat gasket. I know this cause my filter end wrench would not fit the OEM.
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Old 01-09-2006, 12:44 AM   #39
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Could you let me (us) know the part number of the NAPA Gold filter you used, K27? Just curious.

Pat
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Old 01-09-2006, 12:53 AM   #40
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Patrick...was the filter black? There have been several revisions to the Subaru factory oil filters in the last few years. Most applied to the turbo models, but I believe they now have changed all of them to the newer style(slightly smaller) filter. There was also a bad batch that went out a few months ago. There's a thread, I think by Subie Gal, in the service or maintenance forum...somewhere. Might be stickied. Basically, they recalled certain filters for a manufacturing defect taht allowed oil to seep out. If his is one, he can take it to a dealership and have it replaced. She has the numbers of the affected filters on that thread.
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Old 01-09-2006, 01:19 AM   #41
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Interesting, Charge, hadn't seen that. His filter was white (or maybe light grey - it was dark outside so I can't say for sure).

Found the thread in question - http://forums.nasioc.com/forums/show...&highlight=oil . I still have his old, leaky filter out in the garage, I'll have to check what serial number and part number it is tomorrow. I'll be pretty pissed if it's in the known-to-be-bad batch, as my Dad just got his oil changed about 8 or 10 days ago. If this was a known problem 3 months ago, and it's in the F08/09 range, someone at the dealer's gonna be getting an earful from me.

Pat

Last edited by Patrick Olsen; 01-09-2006 at 01:54 AM.
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Old 01-09-2006, 01:48 AM   #42
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It's a 1365
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Old 01-09-2006, 02:30 AM   #43
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Quote:
Originally Posted by K27
It's a 1365
Reading through the monstrous oil filter recall thread, it appears that all '06s use a different filter than the older cars, hence yours is a different number than what NAPA gives me (1334). I might have to swing by NAPA and take a look at a 1365 just for fun.

Pat
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Old 01-09-2006, 03:42 AM   #44
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I've got an 05 STi that I am just about to do the first oil change on. Let me know if you want to know the dimensions of the filter.

-Wes
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