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…. were would that leave some other filters they are 99+ % at 20 microns. Probably 50% of the filters on the market can't make that claim.
Using the known data point(s) that would include many/most of the OEM/OES oil filters, not even close. In my observation, many of those highly respected on this subforum. Add all the unknown efficiency off shore (eg. China) made spin ons frequently praised here for their excellent post use 'appearance', likely much higher than 50% imo.
…. were would that leave some other filters they are 99+ % at 20 microns. Probably 50% of the filters on the market can't make that claim.
Using the known data point(s) that would include many/most of the OEM/OES oil filters, not even close. In my observation, many of those highly respected on this subforum. Add all the unknown efficiency off shore (eg. China) made spin ons frequently praised here for their excellent post use 'appearance', likely much higher than 50% imo.