Purolator PurOne Myth..

[Alex D]

All here agree that the PurOne is a very efficient filter, but I often read that it is considered to be restrictive because of its tight packed filter media and high efficiency.......well if you read the AC Delco comparison chart here: http://www.acdelco.com/html/pi_filt_oil_gold_flow.htm (scroll a little down )
the PurOne is only second to the Delco Ultragard Gold filters and much better than Wix, Mobil 1 and other mainstream filters. i think this redeems this filter to be one of the best on the market.

In addition to this fact, the PurOne has also the Mobil 1 beat in efficiency......see here: http://www.acdelco.com/html/pi_filt_oil_gold_comp.htm

[ December 28, 2002, 08:47 PM: Message edited by: Alex D ]

 

[Al]

Well I wouldn't take it too seriously. For all we know they could have gotten the colors of the lines mixed up. Sorry I believe about 5% of what I read.

 

[L8274]

quote:

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Originally posted by Al:
Well I wouldn't take it too seriously. For all we know they could have gotten the colors of the lines mixed up. Sorry I believe about 5% of what I read.

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Same with me. I still use those dreaded Frams and run my motors a very long time. Those Supertech filters do a good job as well.

Fram haters unite and hate me too !

Seriously. If you did not know one was one you motor I doubt there would be any difference at all over the coarse of 300K and good maintainence between a Fram and those triple price fiters .

It will never be proved though so my statement stands as my opinion only but there sure were a bunch of old cars ran to high miles before these new niche filters came about.

 

[Patman]

quote:

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Originally posted by L8274:


It will never be proved though so my statement stands as my opinion only but there sure were a bunch of old cars ran to high miles before these new niche filters came about.

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True, but at the same time a lot of these old high mileage machines had looser clearances, so a 30 micron filter would still do a good enough job. A new engine with very tight clearances needs finer filtration than 30 microns. That being said though, I think a 20 micron filter can provide more than enough protection for most engines.

 

[sprintman]

I'm sticking with PureONE for now but definitely not in conjunction with Auto-Rx.

 

[OneQuartLow]

Sprintman, I'm installing a dual filter mount before arx goes in. $49 from summit:

Two 40017 PureONE's (~14GPM flow) should stay out of bypass a while.

David

 

[Patman]

David, where did you hear they had 14GPM of flow? My Purolator catalog says 7GPM. Or are you simply adding the two filters flow ratings together to get 14GPM?

 

[OneQuartLow]

Yep. 2x7.

I'm close to using those Baldwin B2-HPG's. They test better than my usual PureONE's both on flow and filtration. The big 40017's will likely be the last until I need another big cleaning filter.

 

[Alex D]

7 gpm on one stock PurOne.......hmmm....I seriously doubt that any engine internals (bearings etc.) flow hat much, so the filter can't be the restricting member in the oiling system

quote:

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Originally posted by Patman:
David, where did you hear they had 14GPM of flow? My Purolator catalog says 7GPM. Or are you simply adding the two filters flow ratings together to get 14GPM?

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[OneQuartLow]

Alex, some factory oil pumps do move more than 7gpm at higher rpms, and during warmup the added flow helps reduce time in bypass.

Still, on this motor (Jeep 4.0L) I agree 7gpm is at least adequate. The reason I'm going for monster filtration is two-fold: 1) reports here indicate arx releases large amounts of engine deposits that quickly load up filters. I don't want a 500mile dirt massage. 2) This is an opportunity to test a new dual-mount brand while going through my supply of PureONE's.

David

[ December 29, 2002, 11:40 PM: Message edited by: OneQuartLow ]

 

[Alex D]

I agree PATMAN.....I also think there is a lot of BS in advertising out there..I however do believe AC Delco's statements...they really would not gain much from misrepresenting anything. They do not rely on selling oil filters to make a living.

quote:

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Originally posted by Patman:

quote:

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Originally posted by L8274:


It will never be proved though so my statement stands as my opinion only but there sure were a bunch of old cars ran to high miles before these new niche filters came about.

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True, but at the same time a lot of these old high mileage machines had looser clearances, so a 30 micron filter would still do a good enough job. A new engine with very tight clearances needs finer filtration than 30 microns. That being said though, I think a 20 micron filter can provide more than enough protection for most engines.

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[sprintman]

Looks good. I've been considering Amsoil bypass as they are readily available here. A lot more expensive though.

 

[Alex D]

OQL........I agree with you that oil pumps will move that much oil, but I guarantee that any engine that allows 7 GPM (this is 7 gallons per minte....that is moving the entire oil supply of the engine six times through the engine in one minute) to flow through its bearings and other pressure lubed internals has some serious problems. Clearances in modern engines, as well as valvetrain will not allow that much oil through the engine..

quote:

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Originally posted by OneQuartLow:
Alex, some factory oil pumps do move more than 7gpm at higher rpms, and during warmup the added flow helps reduce time in bypass.

Still, on this motor (Jeep 4.0L) I agree 7gpm is at least adequate. The reason I'm going for monster filtration is two-fold: 1) reports here indicate arx releases large amounts of engine deposits that quickly load up filters. I don't want a 500mile dirt massage. 2) This is an opportunity to test a new dual-mount brand while going through my supply of PureONE's.

David

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[Patman]

So are you saying that the K&N oil filters 12-16GPM flow is WAY overkill then? I always figured more flow can't hurt, as this way you're 100% sure the filter won't be a restriction, even 10,000 miles later. I'm sure the GPM rating drops in half as the filter gets a lot older (in extended drains that is) I hate changing my oil filter most of all on my Firebird, so the longer I can go without doing it the better. When I'm done my extended interval testing I will decide if I'm going to settle on either a 15,000km or 20,000km interval (9 or 12k) and with NO filter change in the middle. So even at the end of it's life, I want my oil filter to still have the ability to flow more oil than my engine can pump through itself. I don't believe the PureONE would be up to this task, I think it's life would be a lot less.

[ December 30, 2002, 05:49 AM: Message edited by: Patman ]

 

[OneQuartLow]

quote:

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Originally posted by Alex D:
OQL........I agree with you that oil pumps will move that much oil, but I guarantee that any engine that allows 7 GPM (this is 7 gallons per minte...

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Alex, you won't find me disagreeing that 7+gpm is overkill for the average street engine at operating temp, but we're fighting...

-new vs. old filters
-new/stable engine vs. arx cleaning a beater (we know this brutalizes filters)
-warm vs cold (oil may be 10-100+X more viscous)

For the oil nuts here, every moment in bypass is too much.

Turning it around, what problem do you think we're causing by using a large capacity filter? (no Darwinism awards please

)

David

 

[Alex D]

OQL........Ohh noo!! There is nothing wrong with your idea of the two filter set up!! I think it is a great idea and probably getting as close to bypass filtration with a full flow set up as you can get. Sorry, I didn't mean to knock your idea. It is a great idea! I just think the Purolator filters are getting a bad rap here without a reason...that's all.....
Quick Question: Is this filter set up putting the filters parallel so they both filter and oil goes through them both, or are they a serialset up where the oil first goes through the one filter and then through the second one after it passed the first? In that case I would make the first filter something like a K&N or even coarser and the second one a PurOne......just wondering

quote:

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Originally posted by OneQuartLow:

quote:

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Originally posted by Alex D:
OQL........I agree with you that oil pumps will move that much oil, but I guarantee that any engine that allows 7 GPM (this is 7 gallons per minte...

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Alex, you won't find me disagreeing that 7+gpm is overkill for the average street engine at operating temp, but we're fighting...

-new vs. old filters
-new/stable engine vs. arx cleaning a beater (we know this brutalizes filters)
-warm vs cold (oil may be 10-100+X more viscous)

For the oil nuts here, every moment in bypass is too much.

Turning it around, what problem do you think we're causing by using a large capacity filter? (no Darwinism awards please

)

David

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[ December 30, 2002, 09:06 AM: Message edited by: Alex D ]

 

[OneQuartLow]

Agreed, I have also seen them take abuse about the extra pleats and too-high efficiency since early filter studies. I've never seen any data to back up assumptions about this causing reduced flow vs. other filters, but these things die hard. Might hold up under tests, I don't know.

My move to the Baldwin B2-HPG on three vehicles is because of their excellent stats, heavier construction, front bypass valve, and minimal extra cost. Baldwin doesn't make an equivalent filter for several of our other vehicles though so those will continue using PureONE's until conditions change.

I promise to cut open the filters & post pics after the arx cleaning. Oil-geek fun...

David

 

[OneQuartLow]

quote:

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Originally posted by Alex D:
Quick Question: Is this filter set up putting the filters parallel...?...

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They're parallel. The non-bypass dual setups I know of (permacool/TD/NAPA) are meant for high-flow performance applications. Serial would be interesting, but then you'd need to add a second set to make up for added flow resistance. Quad filters anyone?

I briefly considered installing one normal filter and one Trasko after the arx cleaning. That's getting close to the cost of a real dual-bypass setup though, and neighbors would talk.

 

[Patman]

I agree that I'm guilty of PureONE bashing myself, I always tell my high performance car owning friends to stay away from these filters and go for the K&Ns since I just don't feel comfortable recommending PureONEs to someone pushing 400hp with their engines.

I'd love to be able to afford to send off a bunch of filters to SWRI for extensive flow testing and filtering efficiency, but I've also heard one filter test costs $500 to $750, so it's not cost effective by any means. If I win the lottery ever though, I'll be sending every single filter I can get my hands on to those guys to check them out!

 

[metroplex]

My logic is this:

In 10-15 years the gov't will do something to remove internal combustion engine cars if the hydrogen fuel cell tech takes off. My car will last more than 20 years if I use the cheapest oil and air filters + dino oil during this time.

Super-Tech: $2/filter
K&N: $9-$10/filter