Originally Posted By: paulri
I realize that most of the particles that cause wear are the small ones (below 20 microns)--that was shown in the first link, table C, page 8.
But a filters that are at 99% for 20 microns and above, will still be able to catch some of the smaller ones, also.
That would have to reduce engine wear, would it not?
Yes, the high efficiency filters also do a better job at capturing the particles less than 20 microns, so in the long run they should also keep engine wear down more than a much less efficient filter.