Stp welded nut filter

[DCDG]

Kn welded nut filters were champ labs anyone know the stp manufacturer of this design. Here's an example

 

[EvoMan]

This may help:

M

Thread 'New STP Max Performance S7317ML (Made in Vietnam) Cut Open'

Apr 21, 2026

Just bought and cut a new STP S7317ML (Vietnam made) oil filter. It's a recently updated full synthetic filter, supposedly made by Premium Guard (at least, with many parts from Premium Guard). STP Max Life oil filter/Max Performance used to be made by Champion Labs, which is similar to Fram Endurance, Amsoil EAO, etc.

The updated version has internal parts that look very similar to the Carquest EP (full synthetic filter made by Premium Guard). It has an integrated bypass valve, which should prevent the leaf spring leaking issue on some older Champion Labs-made filters. What's interesting...

• MultiLuxem
• Replies: 54
• Forum: Engine Oil Filters

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https://bobistheoilguy.com/forums/t...ance-s7317ml-made-in-vietnam-cut-open.406449/

 

[fantastic]

Even though AZ online shows "Made in Vietnam" in the picture when I actually visit any AZ it's a Champ Labs made filter on the shelf. Obviously, existing stock needs to work its way out but I really want the Vietnam version before I buy.

https://www.autozone.com/p/stp-max-engine-oil-filter-s10590ml/750108

What I see on the shelves...

 

[4wd]

Even though AZ online shows "Made in Vietnam" in the picture when I actually visit any AZ it's a Champ Labs made filter on the shelf. Obviously, existing stock needs to work its way out but I really want the Vietnam version before I buy.

https://www.autozone.com/p/stp-max-engine-oil-filter-s10590ml/750108
View attachment 346414

What I see on the shelves...
View attachment 346410

What’s the efficiency ?

 

[ZeeOSix]

Kn welded nut filters were champ labs anyone know the stp manufacturer of this design. Here's an example

Old ones are Champion Labs like show above in post 3. Champion Labs is now shut down, but stock still on the shelves. The new STP Max Performance filters are now under Premium Guard Inc (PGI). AutoZone website says 99.5% @ 25u efficiency. Probably the same guts as the Carquest Extended Performance full synthetic filter, also under PGI.

 

[Dave Hess]

Ive see some K&N with nut have a slow leak.

No thanks.

 

[DCDG]

Ive see some K&N with nut have a slow leak.

No thanks.

How does it leak maybe from installation using tools it’s obvious the nut is there for ease of removal. Besides that it’s just metal welded to metal. For me the nut is not the selling feature I like the internals. But if there’s any chance of leaking I’ll stick with my economy 10k filters