Yup, that's the difference between absolute and nominal. I emailed Amsoil and Fram and both claim their numbers are absolute, which is way better than nominal. I know some companies use nominal to make them look better.
That's why it's best to inquire.This part (cut & paste below) in the FAQs is off. 1) A filter with an ADBV is going to hold more oil in the filter than one with no ADBV. I did a test on a PureOne and it held all the oil in the filter for a week. 2) The ADBV doesn't inhibit flow enough to even matter, and a filter without an ADBV is not going to slow the flow or the build up of oil pressure under the same start-up conditions. Same goes with a filter that has slightly more flow resistance. People don't seem to fully understand the function of a positive displacement oil pump in an oiling system.According to their website, the media is designed to filter down to 35 microns:
FAQs – K and P Engineering
kandpengineering.com
Yep ... "Nominal" means at 50% efficiency and "Absolute" means at 98.7% efficiency (call it 99% for all practical purposes).Yup, that's the difference between absolute and nominal. I emailed Amsoil and Fram and both claim their numbers are absolute, which is way better than nominal. I know some companies use nominal to make them look better.
No that’s not what they said.
Make stuff up much? A $30 spectrographic analysis with particle count is not the same as a filtering efficiency test nor is it an appropriate substitute. That’s what I said, not that the filter “is **** compared to regular spin on” whatever **** means exactly.
Yeah, their bit on flow there is pretty wild too, lol.
Should I maybe switch to an Orange Fram PH filter and some Fram conventional oil?
As someone who has worked in aviation for the past 27 years or so I’d say nothing. There’s very little that is as behind the times as GA. People get googly-eyed when told “it’s on an airplane” or “it’s FAA approved!”
How many hours of run time is it recommended to change the oil and filter on an airplane? And about how many miles does that equate to on a typical passenger car if the avg speed over the OCI is say 30 MPH.
Isn't that better than the old style 15,000 mi Purolator Boss I'm currently running on my 2022 Subaru Crosstrek?
I think the "new" 20,000mi Boss is 99% absolute at 25 microns but I thought I saw somewhere the old Boss filters were @40 microns.
And what’s the TBO on an aircraft piston engine?
Thing is, if the efficiency falls off very fast on a mesh screen filter that's 99% @ 35μ (which it probably does because the screen window size is fixed), then it can let a lot of debris below 35μ through the screen. Where as, on a high efficiency (99% @ 20μ) filter it will filter quite a bit of the particles below 35μ and 20μ. Engine wear studies show that the most wear is from particles 20μ and smaller.Isn't that better than the old style 15,000 mi Purolator Boss I'm currently running on my 2022 Subaru Crosstrek?
I'm assuming the Amsoil equivalent oil filter, which unfortunately wasn't tested here would or should perform similar to the Fram as they are both rated at 99% @ 20 microns? I ordered 6 Amsoil EAO17 filters when I ordered my Baxter Performance unit, mainly due to the bypass psi being more inline (18-24psi)with the Subaru spec of 23psi vs the Fram which is 16-28psi. Yeah I know it's splitting hairs but I was placing an Amsoil preferred customer oil order anyways so I tacked on the oil filters to the order. Everything I've seen seems to indicate that the Amsoil oil filters are similar to the Frams in terms of efficiency and quality. Price being the main difference. I paid $17/filer for the Amsoil filters.
Yes it is what they said.
I know you think we have a special relationship on here but you really should respond to others in this thread as well. They might get jealous.
It means exactly ****.
