Originally Posted By: Baracoa
Concerning the PurolatorBoss with a filtration rate of 99% at 40 microns, at what percentage rate could it possibly achieve 20-25 microns? Could it possibly be at least 80% at 20 microns?
I'd guess 30% at 20 microns. The media in the Boss has some depth-filtering characteristics, but is not the double-layer depth filtering we see in a Fram Ultra....
From the graph below, if we assume the Boss has good depth-filtering, which it might not actually be that good at doing, then the 99% point is at 40 microns, and half that particle size is halfway to the origin (left side), so its not great, maybe 30%.
http://www.machinerylubrication.com/Read/29396/oil-filter-anatomy
Concerning the PurolatorBoss with a filtration rate of 99% at 40 microns, at what percentage rate could it possibly achieve 20-25 microns? Could it possibly be at least 80% at 20 microns?
I'd guess 30% at 20 microns. The media in the Boss has some depth-filtering characteristics, but is not the double-layer depth filtering we see in a Fram Ultra....
From the graph below, if we assume the Boss has good depth-filtering, which it might not actually be that good at doing, then the 99% point is at 40 microns, and half that particle size is halfway to the origin (left side), so its not great, maybe 30%.
http://www.machinerylubrication.com/Read/29396/oil-filter-anatomy
