K&N not giving out their oil filter specs

[tasch72]

Cool-where did that information come from? Got anything on the black K&N Selects??

I would have to dig through the oil filter section to find a reference on the white K&N HP-series that has them at 95% at 20 microns, so take that with a grain of salt.

I did pull the attached image from K&N in regards to the white K&N HP-series just now putting them at 98% at 30 microns. This is on the HP-2010 (Fram PH2 interchange) and HP-2009 (Fram PH3600 interchange) for my vehicles)

The black K&N Selects list 99% at 30 microns on the product boxes and Walmart.com product description

 

[ZeeOSix]

The Supertech also seems to have the same media, but no micron rating available.

SuperTech rated at 99% @> 30u. And it's the same efficiency rating for both the white and blue SuperTech oil fllters.



Zoom in on box text ... shows >30u at the bottom of the box.

 

[Zee09]

K&N Select note these specs.

 

[Ducati996]

30 microns is just over 1/1000 of an inch, .001182 inches to be precise. I wouldn’t want that running around in my oil!
I wouldn’t give out proprietary information if sales were good. The truth could hurt the bottom line!!
90cummins

 

[RagnarokCamaro]

30 microns is just over 1/1000 of an inch, .001182 inches to be precise. I wouldn’t want that running around in my oil!
I wouldn’t give out proprietary information if sales were good. The truth could hurt the bottom line!!
90cummins

30 microns in today's engines being built with very small bearing clearances is pretty large. Large enough to cause more wear when those particles get to the bearing surfaces.

 

[ZeeOSix]

99% @ 30u removes almost all 30u and larger particles, but lets through more 20u and smaller particles than a more efficient filter. Wear studies say that it's the particles below 20u that do the most wear because they can get passed through the MOFT easier and can then get caught between the bearing and journal. A particle larger than the high pressure MOFT wedge can be diverted around the wedge and get spit out through the side leakage flow of the bearing without doing any damage.

The MOFT in a bearing gets smaller when the oil viscosity is less and also when the RPM is lower. Running an engine on too thin of oil and lugging/loading the engine resulting in higher rod load (mostly a turbo doing boost) at low RPM will result in a smaller MOFT.

 

[EvoMan]

99% @ 30u removes almost all 30u and larger particles, but lets through more 20u and smaller particles than a more efficient filter. Wear studies say that it's the particles below 20u that do the most wear because they can get passed through the MOFT easier and can then get caught between the bearing and journal. A particle larger than the high pressure MOFT wedge can be diverted around the wedge and get spit out through the side leakage flow of the bearing without doing any damage.

The MOFT in a bearing gets smaller when the oil viscosity is less and also when the RPM is lower. Running an engine on too thin of oil and lugging/loading the engine resulting in higher rod load (mostly a turbo doing boost) at low RPM will result in a smaller MOFT.

I learned something new today. Thanks!

 

[Bumpside 427]

I got a small batch of HP-3001's when I bought my '68 Bumpside.
Opened them and they're Made in the USA parts.
I see some say they're Chinese and some Korean, so interesting mine are not. Likely he got these ~5 years ago when the engine was built.
I am thinking of moving to the Purolator Boss - same that I use in my 200k mile FJ Cruiser.
It's hella good at the small particle stuff.
I only wish more companies would put those handy 1" nuts on the ends like K&N. I guess it's just about $$$, which is too bad.

 

[kschachn]

I am thinking of moving to the Purolator Boss - same that I use in my 200k mile FJ Cruiser.
It's hella good at the small particle stuff.
I only wish more companies would put those handy 1" nuts on the ends like K&N. I guess it's just about $$$, which is too bad.

What is the efficiency of the particlar Boss you’re looking at?

 

[Bumpside 427]

What is the efficiency of the particlar Boss you’re looking at?

That is hard to say - looks like the reports are all over the place on that.
I saw another thread where Boss was dissed, and specs in question.
I did watch a YT vid stating they did the best at filtered the small <20 stuff...
Since it's an old engine, I wonder. Old, but only 3500 miles on the build.

 

[ZeeOSix]

That is hard to say - looks like the reports are all over the place on that.
I saw another thread where Boss was dissed, and specs in question.
I did watch a YT vid stating they did the best at filtered the small <20 stuff...
Since it's an old engine, I wonder. Old, but only 3500 miles on the build.

Every Boss spec sheet from M+H posted here shows pretty low efficiency (99% @ 46 microns). Don't believe home made efficiency tests on YT, they aren't official specs from the manufacturer, and sometimes don't even "rank" the same as the official specs ranking.

 

[kschachn]

That is hard to say - looks like the reports are all over the place on that.
I saw another thread where Boss was dissed, and specs in question.
I did watch a YT vid stating they did the best at filtered the small <20 stuff...
Since it's an old engine, I wonder. Old, but only 3500 miles on the build.

Yeah no thanks on the YouTube. Much better to go by what the manufacturer themselves publish, that cuts out the “dissing” as well.

 

[Bumpside 427]

Yeah no thanks on the YouTube. Much better to go by what the manufacturer themselves publish, that cuts out the “dissing” as well.

Agreed. So, with that, wondering what you think of the K&N I have? Use or dump?
Been a couple years since I was in the oil/filter discussions, and trying to catch up
I mean, the builder used them, so I would hope they're OK...

 

[fantastic]

Agreed. So, with that, wondering what you think of the K&N I have? Use or dump?
Been a couple years since I was in the oil/filter discussions, and trying to catch up
I mean, the builder used them, so I would hope they're OK...

Nothing wrong with the K&N or the Boss's & when some here claim "terrible" & start dissing their efficiency none of them can tell you if you're worse off vs using an OEM spec'd filter. These filters are longer lasting than what was spec'd for your truck though. Run the K&N's you have then switch to the Boss like you planned. You will find some here that will try to steer you away though.

 

[kschachn]

Agreed. So, with that, wondering what you think of the K&N I have? Use or dump?
Been a couple years since I was in the oil/filter discussions, and trying to catch up
I mean, the builder used them, so I would hope they're OK...

Other than mechanical integrity (which historically has been a problem for a certain brand) “filtering” is what a filter is supposed to do. For me, as long as a filter holds together properly then the filtering efficiency is the singular most significant attribute. It’s what they’re supposed to do.

The link between filtering efficiency and wear is direct.

 

[Bumpside 427]

Nothing wrong with the K&N or the Boss's & when some here claim "terrible" & start dissing their efficiency none of them can tell you if you're worse off vs using an OEM spec'd filter. These filters are longer lasting than what was spec'd for your truck though. Run the K&N's you have then switch to the Boss like you planned. You will find some here that will try to steer you away though.

Thank you for the reply!
That's all I really wanted. I love getting pedantic too at times, but I also just want to get some basic info on what to avoid more than anything since I've been away from this obsession for a few years...
I've got a great engine, and I don't want to mess with it!