I reached out to Mann Hummel to check on a few PureOne 15k filters as it seems each size has a different efficiency. I guess they are a little better or on par with a Toyota filter. Odd that one is not listed per their email. It is a little smaller than the PL25702 so guessing it is around 40 microns given the trend. Just passing along the info for the forum. I wish these were better given my NC roots. ChampXL and Fram TG may be what I stick with as i like better efficiency and keep my vehicles a while. I've shifted from 10k to 7.5k OCIs using 20k rated oils to edge on the side of caution. Usually run a filter two OCIs.
PL25702 = 99% efficient at 38 micron. (checked for 2019 Tundra 5.7L, cartridge style filter)
PL25609 = Not listed. (checked for 2014 4runner 4.0L, cartridge style filter)
PL14476 = 99% efficient at 50 Micron (checked for 2019 Corrolla 1.8L, spin on filter)
PL25702 = 99% efficient at 38 micron. (checked for 2019 Tundra 5.7L, cartridge style filter)
PL25609 = Not listed. (checked for 2014 4runner 4.0L, cartridge style filter)
PL14476 = 99% efficient at 50 Micron (checked for 2019 Corrolla 1.8L, spin on filter)