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Old 02-03-2003, 06:52 AM   #1
armand1
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Lightbulb My own humble Subaru oil filter study

Here's the link: Armand's Subaru Oil Filter Study
Which other filters would be good to look at for Subies?
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Old 02-03-2003, 10:35 AM   #2
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page not found
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Old 02-03-2003, 10:50 AM   #3
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Quote:
Originally posted by elgorey
page not found
Worked for me.

Looks like some great info, Armand. I haven't had time to pore over it completely, but I'll definitely be back to the site later.
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Old 02-03-2003, 01:24 PM   #4
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How about Amsoil's SDF 20/ SDF 13?
I use sdf 20 for my '02 wrx. They say the MY03 wrx's should use SDF 13. I think these might be made by hastings, but I may be wrong.
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Old 02-03-2003, 02:21 PM   #5
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Default Thank you!!!

Thank you so much for doing this! I really appreciate your work! I have been apprehensive about the OEM filter because Purolators usually use a string around the filter element that could cut the material and allow dirt to flow through. Your findings clearly show that there is no such string in the Subaru filter and that the filter itself is of excellent quality. I will continue using OEM filters with renewed confidence!!!

Thank you x million!!!
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Old 02-03-2003, 02:24 PM   #6
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yeah i use the amsoil sdf20, too. though it's so damned expensive i think i might just oem from now on. i'm religious about oil changes and use mobil 1. nice article, though.

jay
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Old 02-05-2003, 12:01 PM   #7
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AC/Delco, and Motorcraft are about the same as the subaru.
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Old 02-05-2003, 01:38 PM   #8
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Default New Fram's ???

I purchased a couple of Fram's latest "high-end" filters for about $10 each. I think they are called X-2's or something like that. After examining them, I found that they are quite well-constructed, however I didn't cut one open for further examination.

Perhaps Armand will investigate this new filter and add it to his well-written research.

Thoughts?
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Old 02-05-2003, 04:01 PM   #9
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Fram's have two things going against them:

1) They don't make a Subaru-specific filter, and
2) They're cheaply-made pieces of crap, proven by this and a few other studies.

The X-2's may be better filters, but they're still Honda filters that only happen to work on Subarus. Until Fram makes a Subaru X-2 filter, there's no reason at all to ever buy one.
I wouldn't put one on my car even if I got a case of them for free.
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Old 02-05-2003, 10:07 PM   #10
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There's a store down the street from my place that sells Wix filters, and I've heard good things about them.
I bought some of the PureOne filters at Fred Meyer and there were some good coupons on the shelf so the unit cost was pretty low.
You might try cutting open Pennzoil (sp) and some of the other filters to see how they compare to the Fram as far as cheapies go.
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Old 02-05-2003, 10:21 PM   #11
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Thumbs up

Another vote for Amsoil! If your someone who changes their filter/oil every 3k miles they say the Pure one and Mobil one filter are pretty good.

http://www.amsoil.com/products/sdf.html

And as far as Mobil one being the best...check this out

http://www.go-synthetic.com/amsoil_v...vs_mobil1.html


This is probably one of the most informative web pages I have found on lubricaton.

http://go-synthetic.com/index/index.html




Last edited by Camperguy; 02-05-2003 at 10:28 PM.
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Old 02-06-2003, 12:04 AM   #12
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Quote:
Originally posted by Camperguy
This is probably one of the most informative web pages I have found on lubricaton.
That is probably one of the most biased web pages I have found on lubrication.

For the record, I have Amsoil in the car now but will be switching to Mobil 1 next time because it's just easier to procure. 1% better this, 3 grams more that, 6 degrees lower the other thing....those differences are just too small to make a disciple out of me. Both are almost certainly better than dino oil.
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Old 02-06-2003, 03:53 PM   #13
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Good work Armand, it sure is funny how these subjects bring out some serious trash talk.
I would be interested in seeing the Amsoil SDF-20 (-13 is laughably small) and the Mobil 1-104. I would be willing to supply one or two to you for the dissection.
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Old 02-06-2003, 04:54 PM   #14
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Just remember Filtration efficiency is derived from the materials used in its construction and test results with SAE standards not the size of the filter.Biased you bet Iv`e been racing and tinkering with engines(crappy V8`s) for over 20 years and been researching this issue to death thats why I`m biased Hey run K-Mart oil and a roll of toilet paper if you want.Yes I think getting Amsoil is a P.I.A. but so is driving out of my way to run Sunoco Ultra 94 gas.



Bill

Last edited by Camperguy; 02-06-2003 at 05:08 PM.
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Old 02-08-2003, 11:43 PM   #15
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I used to run OEM subaru filters....then amsoil....now the big daddy of them all......

http://www.cmfilters.com/spin-on.cfm


Personally I like the idea behind the filter. Also when I had the stock engine I had a drivers side lifter tick for the first few sec on initial startup....that disappeared after this filter. I believe it flows with much less restriction and its filter efficiency is superior. Yeah, so the price is a little ridiculous but hey, it gives you that warm fuzzy feeling.
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Old 02-10-2003, 01:33 PM   #16
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Default Re: My own humble Subaru oil filter study

Quote:
Originally posted by armand1
Here's the link: Armand's Subaru Oil Filter Study
Which other filters would be good to look at for Subies?

I've been using NAPA gold 1334(by wix) since my 1st change. I'm at 31k now. No problems so far, it looks like it is constructed well, and I've heard nothng but good thing about it. Maybe you could check that out too. BTW nice page,

Bryan
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Old 02-10-2003, 01:59 PM   #17
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This is the second hacksaw-type "Oil Filter Study" I've seen that calls Fram's filter media "cardboard". But I was under the impression that it's a glass fiber/cellulose composite? Just like the vaunted Amsoil SDF filters?

I'm curious what about this material made you guys think it was cardboard vs the composite material

Last edited by micah; 02-10-2003 at 02:15 PM.
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Old 02-10-2003, 02:23 PM   #18
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No one's saying that the filtering media is carboard. It's the caps on the ends of the filter cartridge that seal it against the filter that are made of cardboard. Everyone else's is either rubber or steel.
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Old 02-10-2003, 02:42 PM   #19
micah
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My bust! I misread the part that said "cardboard filter cartridge" :blush:
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Old 02-12-2003, 12:10 PM   #20
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very good page, and it proves my point that Fram is the root of all evil.
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Old 02-12-2003, 02:47 PM   #21
motojosh
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Default Just a thought

I've been mulling this idea over for a few days now . . . I wonder if, in addition to the already comprehensive information that Armand has provided, it might be useful to somehow measure the flow through the filters. I don't mean something as precise as "what's the smallest micron that can pass through the filter media?", but maybe something simpler. Like pouring a specified amount of oil into each filter and then timing how long it takes to filter out.

Would that be a good measure of the filtering ability, or would we not learn anything useful?
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Old 02-28-2003, 02:33 PM   #22
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Oh crap I have been using Fram PH3593A for over 27K on my WRX. I better change it now!

I guess the biggest concern is the "cardboard" components. Interestingly oil filters have been made that way for years. Also a weak bypass valve is the other concern. Well I would rather have the by-pass valve fail open than closed! Of course having it work properly is better.

We Subaru owners don't have to worry so much about the oil filter holding oil for cold start up. Our filters mount vertically. Also if you change "dino" oil every 3K mi a "top of the line" filter is really not worth the extra money.

Still not convinced but here is another hacksaw study;
http://www.ntpog.org/reviews/filters/filters.shtml
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Old 03-01-2003, 02:28 AM   #23
armand1
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Quote:
I have been using Fram PH3593A for over 27K
You might want to change a bit more frequently, like every 3-5k miles

But seriously, you don't have to pay very much for a decent filter. The "top of the line" ones run $10 or more, but a decent one like the Subaru OEM, normal Purolator, etc will only cost $4 +/-. Even if a Fram costs only $2, spending an extra $1 or less per 1000 miles doesn't seem like a big expense compared with the risk.
As for the Fram, my concern would not be the cardboard construction (as DucatiBoy points out, many have been made that way for a long time), but rather with the significantly lower-than-OEM spring tension on the bypass valve, and the significantly less surface area of filter material. Less surface area will increase backpressure; that, combined with the easier-opening bypass valve, means that the Fram will NOT be filtering the oil (due to bypass) much more of the time than the OEM or PureOne filters. Why save $2 at the expense of less-than-OEM levels of oil filtration?
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Old 02-09-2004, 03:52 PM   #24
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Don't panic if you have used Fram filters. That's pretty much all I have used on my 95 Legacy and it's still running fine after 170,000 miles. I am using OEM in the WRX, though.
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Old 02-09-2004, 04:38 PM   #25
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Quote:
Originally posted by Mike Wevrick
Don't panic if you have used Fram filters. That's pretty much all I have used on my 95 Legacy and it's still running fine after 170,000 miles. I am using OEM in the WRX, though.
Good to know...
I always crack up when someone says something like, "14K miles and no problems!" I had a girlfriend who didn't change the oil in her 626 for almost 30K miles and she didn't have any "problems". I'm guessing her engine wouldn't make it much past the 100K mark, though.
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