I want to know if Mobil1 oil filters are comparable to AMSOIL filters. I've tried many ways of searching, but all I can manage to do is search for a single term. As Keyword search terms in this forum I've tried: AMSOIL Mobil1 AMSOIL+Mobil1 AMSOIL + Mobil1 AMSOIL and Mobil1 the best I get is posts containing either term. This is true no matter which forum I'm searching, and regardless of whether I search subject or subject and body. I've used many, many, many online forums and have never had any problems like this. Am I missing something? Is there something wrong with the search feature here? Also, I thought there was an article or post somewhere here in BITOG.com that compared various oil filters, their pressure drops, filtering ability, etc. (including pictures of the filters cut apart). Thanks for any advice or info!