Originally Posted By: David1
So to me... that would make me think it did its job... Think about it.
So I like the fact that your Fram Ultra is DIRTY..... shows it did its job.
Im starting to think that not all filter media is the same... Perhaps some filter media is high quality and others may be less quality.
I mean its possible.
Since the Fram Ultra uses media designed for depth loading (where particulate is captured within the media, not just blocked at the media surface), and uses 2 ply (which are probably two different micron ratings - coarser on the outer layer & finer on the inner layer), it appears to be a density gradient depth loading media.
One other note I can think of - since depth loading style media is designed to trap the particulate within the media, concerns about particulate sloughing off the element surface during a bypass event should be considerably less. It certainly is for me.
It makes sense that the change from Xtended Guard with a conventional outer media and inner synthetic media to 2 layers of synthetic media in the Ultra - there wasn't really a great benefit by adding the layer of synthetic depth loading media under a layer of surface loading design media.
