Well it seems the PG made Napa Gold is 99% at 30 microns. See video below.
The media between all of the PG 10,000 mile filters looks the same to me so that is what I am going to assume they all are. In fact, some Carquest Premium listings also say 99% at 30 microns.
In one of WCW's videos, the Napa Proformer looks like it has the same 10,000 mile PG media.
99%@30 not personally impressed. But better than constant bypass!!