Oops...somehow I missed your post.
Ya. The chart is probably valid for whatevert they measured but I'm always skeptical of incomplete data when it's published by the manufacturer. Like My old Logic professor would have said, "it's suspect right away because of vested interest"
Well, I won't go quite that far, but who knows...maybe they changed media before I got this UPF52 and after the chart was made?
All I know is it's quite a bit harder to push fluid through the UPF I have than the P1 I used.
...Not that it means anything about the worth of the UPF in use. Heck I'm gonna try and get UPFs for my own use from ebay, thanks to a link from Ronn!
I found this correspondence from ACDelco on line (can't recall where). Don't know if this *helps*..but interesting none the less.
The Ultraguard Gold goes even beyond the Duraguard Silver Filters by
providing a 100% synthetic media that can trap contaminants down to 8-10
microns with an even lower resistance to flow than the Duraguard Silver
filters (see below). In addition this 100% synthetic media is wire backed.
The wire backing helps ensure that the filter media can endure very high
differential pressures, that may occur on cold start up or severe usage,
with less likelihood of internal buckling of the media (which can impeded
oil flow). This highly durable wire-backed media thus helps ensure the
likelihood that the oil will flow through the filter and not bypass the
filter through the oil bypass valve, as may occur on filters with a media
that flows less freely. The Ultraguard oil filter also features a
Teflon-coated gasket, like the Duraguard Silver, that helps to eliminate
leakage and is easier to install and remove.
You may also be asking what's so special about this synthetic media over
cellulose media. And that's a great question! As indicated above, the
term synthetic simply means man-made. The synthetic media used in our oil
filters is made of a fiberglass-like material. The media pores in this
material are more uniform in size and smaller as well, which allow it to
trap smaller contaminants. Even when the media openings are smaller, their
more uniform size and greater number allow excellent oil flow through the
filter. In terms of 20-micron efficiencies, most premium filters perform
very similar. When compared to other premium oil filters the Ultraguard
Gold oil filter has a very low resistance to flow while at the same time
filtering very tiny particles.
We hope that this information was helpful to you!
Thank you for your interest in ACDelco.
