jbplock has done a ton of research to comeup with the "Baldwin is better" claim, but he did not get any information from Amsoil. Could you provide the same information that we have for the Baldwin, Wix, and AC Delco filters??? There may be a better filter, just at the time that is all he could find.
Speaking of filters, i just remembered a funny story(funny now, but not then cause it was my truck). I bought a new '93 Suburban 454 and at 3k changed oil to Mobil 1. That evening when i started engine to go home i heard a God awfull knock for a few seconds. I get worried. Next morning i call Mobil; they say " not us dude". I then call GM (my shop was a warranty trans center for GM at the time). I tell my story to the engineer and he asks some questions and says he will get back to me. He calls back in about 15 minutes and says get that PS Fram the hell off your truck and explains why. Knock went away and i have from that time on bought OEM filters.
I'm not saying that Amsoil is better because honestly can't say. I guess I have never seen the other information
I have used both the Baldwin and Amsoil filters. Additionally, I have cut both open after use. The filters are constructed identically. The filter media even "looked" the same, but I could not determine the actual make-up of the media. There could be small differences. However, as Bill (Jbplock) survey results point out, most manufactures were willing to share the performance info about there filters, while Amsoil was not. As an Amsoil dealer, maybe you can get some info from them, share it with everyone here and fill in the hole. Until then, I will consider the Baldwin/Amsoil to be the same and probably the best choice for DMAX filters (my opinion).
For those who would like to see some pictures of "dissected" DMAX oil filters, go to this link:
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