Here are Premium Guard's main Oil Filter suppliers

Well it seems the PG made Napa Gold is 99% at 30 microns. See video below.

The media between all of the PG 10,000 mile filters looks the same to me so that is what I am going to assume they all are. In fact, some Carquest Premium listings also say 99% at 30 microns.



In one of WCW's videos, the Napa Proformer looks like it has the same 10,000 mile PG media.

99%@30 not personally impressed. But better than constant bypass!!
 
Well it seems the PG made Napa Gold is 99% at 30 microns. See video below.


Edit ... not 9 years old, misread on my part.

That video is 9 years old. NAPA does not have the same supplier today that they had 9 years ago. We all know how fast the filter world changes. NAPA has probably had 2 or 3 different supplies since 9 years ago.
 
Last edited:
That video is 9 years old. NAPA does not have the same supplier today that they had 9 years ago. We all know how fast the filter world changes. NAPA has probably had 2 or 3 different supplies since 9 years ago.
Very good. Back with Napa website. 99%@23!
 
That video is 9 years old. NAPA does not have the same supplier today that they had 9 years ago. We all know how fast the filter world changes. NAPA has probably had 2 or 3 different supplies since 9 years ago.

Yikes what is wrong with you!!!!! It's 9 DAYS old!
 
Yikes what is wrong with you!!!!! It's 9 DAYS old!
LOL ... guess so. 🙃

They look like PG made filters, and I believe there were some videos posted hear awhile back that talked about WIX going with PG made filters. But, as usual just because all kinds of filters are made by PG doesn't mean they all have the same media nor the same efficiency rating.
 
This says they are: "Synthetic blend media provides 99.5% efficiency at 20 microns and 2X capacity vs. Standard filters."

Scroll down to "Product Features:"
https://shop.advanceautoparts.com/p...rotection-up-to-10-000-miles-84502/10558118-P

Yes that sounds like a previous manufacturer.

The filter I'm interested in seems to be in line with NAPA:

http://weblink.carquest.com/acl/?mfgName=CFI&partNumber=85372

"99% filtration efficiency at 30 microns"

I think that overall, all the people tasked with keeping this information accurate and up to date across hundreds of filters are just not that interested as we are. And that includes PG.

I have though seen signs that NAPA cares about their filter quality and what the actual specs are so out of everyone out there providing information, including PG, I trust NAPA the most.

I think someone at O'Reilly was not paying attention when they copied the 25 micron wording which on PG's website says something different. And there is no specific filter mentioned for that claim, AND tellingly, there is nothing on any box.

And lastly there is no reason for low cost Asian manufacturers to shoot for Purolator One / Fram levels of efficiency as well as 15k to 25k holding capacity since using such media cuts into their margins even more.
 
just because all kinds of filters are made by PG doesn't mean they all have the same media nor the same efficiency rating.
I've watched almost every WCW C&P and the media in PG, Ecoguard, Carquest Premium, Microguard Select, STP XL are the same both magnified and not magnified, with a 5% variance in thickness. A NAPA Proformer had the same media but in general the basic filters had a thinner and less dense media.

Without the specificity and clarity that we've had in the past from other brands, I'm going to assume they are all no better than 99% at 30 microns.
 
Last edited:
Yes that sounds like a previous manufacturer.

The filter I'm interested in seems to be in line with NAPA:

http://weblink.carquest.com/acl/?mfgName=CFI&partNumber=85372

"99% filtration efficiency at 30 microns"

I think that overall, all the people tasked with keeping this information accurate and up to date across hundreds of filters are just not that interested as we are. And that includes PG.

I have though seen signs that NAPA cares about their filter quality and what the actual specs are so out of everyone out there providing information, including PG, I trust NAPA the most.
As fast as oil filters change, and the constant buying of one filter company by another with seems to drive that company into another direction, and who supplies who with their branded oil filters, who knows what info is up to date or not. Might as well get out a dart board, lol.

I think someone at O'Reilly was not paying attention when they copied the 25 micron wording which on PG's website says something different. And there is no specific filter mentioned for that claim, AND tellingly, there is nothing on any box.

And lastly there is no reason for low cost Asian manufacturers to shoot for Purolator One / Fram levels of efficiency as well as 15k to 25k holding capacity since using such media cuts into their margins even more.
Here's what PG shows on their website. Actually, the way it's worded here, it very well could mean that it filters at 99% for all particles that are 25u and larger. Saying "as small as" is tied to the 99% efficiency part of the statement,

1727389350679.webp
 
As fast as oil filters change, and the constant buying of one filter company by another with seems to drive that company into another direction, and who supplies who with their branded oil filters, who knows what info is up to date or not. Might as well get out a dart board, lol.


Here's what PG shows on their website. Actually, the way it's worded here, it very well could mean that it filters at 99% for all particles that are 25u and larger. Saying "as small as" is tied to the 99% efficiency part of the statement,

View attachment 242333
Which matches the Microgard Select. The one I trust most.
 
I've watched almost every WCW C&P and the media in PG, Ecoguard, Carquest Premium, Microguard Select, STP XL are the same both magnified and not magnified, with a 5% variance in thickness. A NAPA Proformer had the same media but in general the basic filters had a thinner and less dense media.
The Earth looks flat from many different spots on the Earth too. ;) Only way to know for sure would be to hear it from PG that that every "extended" filter model they make uses the same exact media. Or an official ISO 4548-12 test of the same sized filter of all the different branded models they make.

Without the specificity and clarity that we've had in the past from other brands, I'm going to assume they are all no better than 99% at 30 microns.
See my post above. PG's efficiency statement very well could say the efficiency of their extended filter is 99% for particles 25u and larger by the way it's written. I emailed PG awhile back asking for clarification on that statement, but never heard anything back from them.
 
Here's the statement on PG's website about their standard oil filters. It makes sense that there premium extended oil filters would have batter efficiency than their basic filter line. So 99% @25 and larger particles doesn't seem out of line.

1727390090141.webp
 
Here's the statement on PG's website about their standard oil filters. It makes sense that there premium extended oil filters would have batter efficiency than their basic filter line. So 99% @25 and larger particles doesn't seem out of line.

View attachment 242336

The longer life filters from WIX and Purolator have worse efficiency than the lower tiers even sometimes the basic cellulose.

PG construction is excellent, but for their price point, they have no reason to buy any fancier media either for longer life or higher efficiency.

In any case, I hadn't seen that 93% at 25 microns. Here is a list of all the claims by PG that I am aware of. Apart from the inconsistent wording, missing elements and contradictions, note how they never mention which filter model they are talking about and never respond to any enquiries!

Conventional

1) 93% multi-pass at 25 microns
2) 96% Multi-Pass efficiency and removal of particles as small as 20 microns
3) Micron rating 15~25

Extended Life

1) 99% efficiency per ISO-4548-12
2) 99% Multi-Pass efficiency and removal of particles as small as 25 microns
3) Micron rating 42~60
 
Last edited:
The longer life filters from WIX and Purolator have always had worse efficiency than the basic cellulose.
Doesn't mean the same goes for other filter brands and models, ie Fram Ultra, Titanium and Endurance. Royal Purple also high efficiency and extended use rating.
 
Doesn't mean the same goes for other filter brands and models, ie Fram Ultra, Titanium and Endurance. Royal Purple also high efficiency and extended use rating.

No but those extended life medias are more than double and I understand higher cost to get both the life and 99%+ filtration at 20 microns.

PG is operating in the Supertech, Fram Extra Guard, ACDelco kind of territory.
 
No but those extended life medias are more than double and I understand higher cost to get both the life and 99%+ filtration at 20 microns.
Their Extended Life filters are more expensive, but doesn't mean they have the lower efficiency like their low tier 5000 mile rated filter.

PG is operating in the Supertech, Fram Extra Guard, ACDelco kind of territory.
Yes, with their basic filter lines, but their Extended filter line is above that level of oil filter IMO. The PG Extended version is rated to 10K instead of 5K, so still far from the rating of the Ultra, Titanium or Endurance max use rating.
 
Lots of info on PG filters. Afaik though, no one been able to get the PG date code format info to determine manufacture date. It does seem first two digits are year made.
 
Back
Top Bottom