I take it you haven't noticed the changes to the AC Delco line, mentioned in that article.
The synthetic media AC Delcos are mostly discontinued.
The $3 AC Delcos discussed in this thread are of average quality filters and are vastly inferior to Mobil 1's media and construrction.
Often you'll get better quality and manufacturing consistency by going with Wix, Purolator or Motorcraft.
Todays AC-Delco's are not whay they used to be.
[ November 06, 2005, 08:07 PM: Message edited by: vad ]
While it may not be a Mobil 1 filter, AC's media actually filters better anyway.
I have seen come PF52s with a silicone ADBV, but these were made in Mexico, and were not supposed to be sold in the US. See the many threads about them being sold at Advance auto.
The Grease test had both the synthetic media Pf-35L and the "normal" media version. Take a better look. The results are still relevant and normal champion AC's have not change as of yet, with identical construction to even the new M1s.
I also purchased a ac pf52 with silicone ADBV and the base-thread end looks identical to a wix oil filter to me. Could wix be a new supplier for ac delco filters?