Originally Posted by ZeeOSix
Originally Posted by Farnsworth
Originally Posted by ZeeOSix
Originally Posted by Farnsworth
I like the Ecore type center cage and baseplate on the one RP filter. Nice and clean.
The 5 micron rating might just be from extrapolation of the graph and marketing approves that method. The fast lab test wasn't going below 10 or above 98.7in it's range? Extrapolating can be fun maybe. Nothing wrong with having fun.
Remember those long discussions about how particle counters work, and what ISO 4548-12 calls out for what particles sizes the particle counters must measure? Yes, they do measure down to 5u ... even a lowly 6 channel particle counter. A 5 channel counter might only go down to 10 microns.
Section 9.3.7 from ISO 4548-12.
You are in all the rooms checking labels on the machines? Or it also could be extrapolation by the bean counters trying to be ahead of the other company. How about this? LEAVE ME ALONE.
It's an official formally used industry test standard that's been around since 2009, and lays out all kinds of formal requirements to run the testing. Go find a copy and read it sometime. Wow ... some people just don't get it, lol. Put me on ignore if you don't like seeing me commenting on misconceptions - like someone saying "
The 5 micron rating might just be from extrapolation of the graph and marketing approves that method" ... it's not, the particle counters used are capable of measuring down to 5 microns.
I agree that this is an important distinction to make. I was invited to a webinar sponsored by Fram recently and one of the guys on the show was affiliated with Fram. He went into some detail about how they test for filtration efficiency but didn't say much beyond that 20 microns is their brand's baseline. I know Motorking Jay has some old posts from when he was here in which he related efficiency ratings for the Ultra below 20 microns, I don't know why Fram would withhold this information at this point. They could publish those figures and it would help them show that they have a better product.
For example I think I can see why a company like K&N does not publish any efficiency data for its oil filters. I looked up as much information as I could find and someone here shared their beta ratios a few years ago and they were something like 95% @ 20 microns and 99% @ 75 microns. It seems like the industry benchmark is 99% @ 50 microns so if I had a product that wasn't hitting it I would not want to advertise that information even if performance otherwise was considered acceptable.