Bought my first MicroGard Select extended life

[MParr]

AC Delco is 98% at 25-30 microns, depending on the style.
Motorcraft is 99% at 30 or larger.
Purolator and WIX are efficient at spreading glue throughout your engine.
This is old data.
https://www.selectsynthetics.com/oil-filtration.html
I'll pick any brand of PGI canned over most any can style filter.
For cartridge filters, I'm not real picky.

 

[RobbS]

Consensus? NAPA Gold uses the same manufacturer as Microgard Select, Carquest Premium, STP XL, and others. PGI has numerous plants in Asia. A search will give you the private label brands made by PGI.

One thing you mentioned was STP, I thought those were bottom of the barrel oil filters. Are they spec'ed to be built with less quality?

 

[Hohn]

plan to switch to their premium filter, EP is overkill for my application

The advantage of the EP filter is not the ability to run it a long time. Rather, it's how consistent (and high) the efficiency is for however long you choose to run it.

Every filter tends to lose efficiency over time. The newer the media and the smaller the fiber, the less efficiency it loses.


When you account for the loss of efficiency over time, the EP filters remove more contaminants over the life of the filter, even if they have the same nominal efficiency rating. That rating is only a snapshot in time when NEW, and it's not the case that a filter that starts out rated 99% at 25 micron when new is still that efficient after 5k miles.

There's no such thing as overkill in filter quality. Ignore the life rating. Enjoy the superior efficiency-over-interval regardless how long that interval is.

 

[Hohn]

After suggestions from our website, I pulled the trigger and picked up two MG filters for both cars.
I do not live near an Oriellys so I made a road trip for some detailing products I had to have and towels too .

The filters seem consistent with adiquit pleats, no excess glue, the internal look fine. Maybe a bit like XP.



View attachment 309317

View attachment 309318

Looks like ORAP now has their version of the PGI EP filter the AAP had.


Take the excellent PGI quality and upgrade to fully synthetic, mesh-backed media? YES PLEASE!!

M

Thread 'Carquest EP P84502 (Vietnam) Virgin C&P'

Aug 8, 2025

A view into the new Carquest EP P84502 (Vietnam).

- No efficiency claims
- 54 pleats, 27 x 2 x 3 =162 in2 media area
- 2 thin and stiff layers of media, similar composition, very tough to tear. Very unlike Fram’s thicker, fluffier media
- Plastic mesh backed, also very tough
- Precise glue job, glue was very tough to break apart

More photos to come

• mxkx
• Replies: 44
• Forum: Engine Oil Filters

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[MParr]

One thing you mentioned was STP, I thought those were bottom of the barrel oil filters. Are they spec'ed to be built with less quality?

STP XL is a PGI made filter. The regular STP S models are made by Champion Laboratories. There are reports that the STP XL may be of different manufacturers in different areas of the U.S.

Thread 'Stp Extended Life Oil Filter S7317XL'

Jan 2, 2025

Howdy Folks,

AutoZone have their oil change deals, I purchased five quarts of Pennzoil Platinum Ultra 0w20 and a STP Extended Life Oil Filter for $37.99.... The filter is new old stock STP Extended Life l Filter made in the USA, The older STP filters have the nylon cage and New models are made in China, What company use to make the made in the USA nylon cage extended life oil filters?

• Charmet37
• Replies: 25
• Forum: Engine Oil Filters

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[Lawnman23]

The advantage of the EP filter is not the ability to run it a long time. Rather, it's how consistent (and high) the efficiency is for however long you choose to run it.

Every filter tends to lose efficiency over time. The newer the media and the smaller the fiber, the less efficiency it loses.


When you account for the loss of efficiency over time, the EP filters remove more contaminants over the life of the filter, even if they have the same nominal efficiency rating. That rating is only a snapshot in time when NEW, and it's not the case that a filter that starts out rated 99% at 25 micron when new is still that efficient after 5k miles.

There's no such thing as overkill in filter quality. Ignore the life rating. Enjoy the superior efficiency-over-interval regardless how long that interval is.

I understand what you are saying but how would the efficiency of a used oil filter after 5k miles be measured to compare against its new out of the box rating?

 

[ZeeOSix]

I understand what you are saying but how would the efficiency of a used oil filter after 5k miles be measured to compare against its new out of the box rating?

With a $3000 ISO 4548-12 efficiency test.

 

[OilStained]

I’m on the MG bandwagon. Can’t wait to use.

 

[Hohn]

With a $3000 ISO 4548-12 efficiency test.

This, but run it all the way to whatever delta P is the bypass value, since that represents the “terminal” restriction generally.

Within the high efficiency fuel filters I work with, Cummins distinguishes between a “terminal” restriction limit and a “service restriction” limit. The former is what the media itself can handle for restriction before you get into potential issues with collapse, media migration and such. It’s a characterization of the *media* only.

The service restriction limit, however, is the maximum filter restriction that the fluid system can handle within it’s “normal” range. Let’s say you have a high flow condition and apply this to a lube filter… (hot thin oil, racetrack conditions at high RPM). If the oil pump has a bypass setting of say 60psi and the minimum oil pressure into the bearings is, 30psi, then you’d have up to 30psi to “budget” for restriction between the oil pump outlet and the bearing inlet drilling. The amount that the filter consumes from that budget would be the “service restriction” limit.

Obviously, the terminal restriction should considerably exceed the filter’s service restriction limit to ensure the filter is changed before any potential issues with media integrity arise.

You always want to individual components of a system to be more capable individually than they are required to be as part of the functional system. (That said, there’s always *something* as a component limit that comprises the system limit).

 

[RobbS]

With all that said and explained, which filter do you place on your own car or truck ??

 

[Lawnman23]

I have been switching everything over to Carquest Premium or MicroGuard Select filters. Excellent construction and filtration specs.