Gruber
Senior Member
- First Name
- Mark
- Joined
- Jan 27, 2018
- Threads
- 2
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- 2,309
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- 1,521
- Location
- TN
- Vehicle(s)
- 2018 Honda Civic Sport Touring; 2009 Honda CR-V EX-L
Can you provide link with the Boss being rated at 20 microns. They do claim 99% dirt removal power but without a micron rating is virtually meaningless. The only info I found is rating it at either 32 or 40 microns and this was on Bitog. For some reason, Purolator does not disclose this most likely because it is inferior to the competition.
It's an interesting topic, although not very relevant. I currently use Honda A01 filters in the Civic. I used Purolator Da Boss once in the CR-V. I was impressed by its weight and looks.
But is it really so hard to find links and data? Here they are:
Both manufacturers put this info in a footnote, and use very similar language about dirt. Interestingly, on the FRAM internet page (which btw. feels clumsy and a bit hard on my browser/display driver both on desktop PC and on iPhone/iPad) they only tell you about their PH, TG and EG models, but somehow nothing on the XG (Ultra). Hmmm.. Suspect.
https://www.fram.com/products/consu...s/fram-ultra-synthetic-oil-filter/#collapse_2
*FRAM Group testing of average filter efficiency of PH8A, 3387A and 4967 or equivalent FRAM TG or EG models under ISO 4548-12 for particles greater than 20 microns.
Purolator's footnote, in contrast to FRAM, does include their full synthetic media filter PBL, but, interestingly, says that the filtering efficiency is a bit less, and they had to use 25 micron instead of of 20 to get "99%+" results.
It looks like it is harder to make a synthetic media filter with equally good filtering as the good old cellulose.... That's because the other important parameter is permeability. If you make holes too small, it requires more pressure to push the oil through. FRAM has to use double ply to improve filtering, but what's the pressure drop on their filter? Nobody gives these data, instead focusing on microns. Mobile 1 gives 30 micron right on the box, and I'm 100% sure their filter is more than sufficient.
Purolator: (the cheaper Purolator filters actually catch a tiny bit smaller particles 20 vs. 25 microns at the level of 99+% )
http://www.pureoil.com/en/do-it-yourself/oil-filters/oil-filter-selection-guide/
*Based on ISO 4548-12 at 20 microns on L30001 and PL30001; 25 microns on PBL30001
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