Oil filter -vs air filter testing effciency clarification?

[Ed_Flecko]

"If" what I read online is correct, ISO 5011 is the standard method for testing air filter efficiency, and for oil filters the "standard" method is ISO 4548-12.

In this Duramax ISO 5011 Test article about air filters (https://bit.ly/3g2X4ys), the writer states, "A filter with a 98% efficiency rating would pass roughly twice as much dust as a filter with a 99% efficiency rating, so what seems like a small difference is actually quite a large one."

Is this same statement true for oil filters? Would an oil filter with a 98% efficiency rating pass roughly twice as much debris as a filter with a 99% efficiency rating?

Thank you,
Ed

 

[ZeeOSix]

ISO 4548-12 is based on muti-pass efficiency, which is a real time measurement of upstream vs downstream particle counts. If the filter is 50% =>20u then it's letting 1/2 of the particles upstream to pass through the filter. If the filter was 99% @ =>20u and 1000 particles that were =>20u hit the filter media, then 10 particles would go through the media. If the filter was 98% @ =>20u then 20 particles would pass through, which would be twice as many particles.

 

[Ed_Flecko]

ISO 4548-12 is based on muti-pass efficiency, which is a real time measurement of upstream vs downstream particle counts. If the filter is 50% =>20u then it's letting 1/2 of the particles upstream to pass through the filter. If the filter was 99% @ =>20u and 1000 particles that were =>20u hit the filter media, then 10 particles would go through the media. If the filter was 98% @ =>20u then 20 particles would pass through, which would be twice as many particles.

View attachment 25859

Excellent...thank you for the clarification!

Ed

 

[ZeeOSix]

The table below shows a theoretical example of how many times a starting concentration of a million particles =>20u would pass through the filter media based on their ISO test efficiency, and make their way through the oiling system for multiple trips. With a less efficient filter, many more particles will make multiple round trips through the oiling system and possibility cause more engine wear.

 

[bbhero]

"If" what I read online is correct, ISO 5011 is the standard method for testing air filter efficiency, and for oil filters the "standard" method is ISO 4548-12.

In this Duramax ISO 5011 Test article about air filters (https://bit.ly/3g2X4ys), the writer states, "A filter with a 98% efficiency rating would pass roughly twice as much dust as a filter with a 99% efficiency rating, so what seems like a small difference is actually quite a large one."

Is this same statement true for oil filters? Would an oil filter with a 98% efficiency rating pass roughly twice as much debris as a filter with a 99% efficiency rating?

Thank you,
Ed

Ed... In regards to the IS ON 5011 air filter testing... It is way better if the test is done with fine dust size particles vs coarse dust sized particles. Only the air filter from AutoZone stp premium air filter mentions on the box the 98 percent efficiency is using the fine dust particles per ISO 5011. One of our members called Fram and they say their Ultra air filter uses the fine dust test in their testing as well. Though it is not listed as such on the box.

And thank you for being so cool and understanding in that other post situation. I appreciated that.

 

[Ed_Flecko]

..."And thank you for being so cool and understanding in that other post situation. I appreciated that."

You're very welcome. It's always a pleasure to interract with polite people.



Ed