allensteiner wrote:oil filters don't differ much.
Actually, that's very inaccurate. Filters absolutely differ. Construction type, materials, filter element (material and surface area) vary greatly.
However, you are right in saying that Wix is a good choice.
Another good choice (and a cheap choice) is WalMart's Supertech. They're manufactured by Champion labs who makes the best filters out there (in my opinion, based on a good deal of research) Including Mobil1. They're similar to Mobil1 filters, but have a slightly lower-quality filter element. Construction and other materials are still top-notch like the Mobil1, though.I use SuperTech filters in my cars.
Fram filters are horrible. Construction and materials are bottom-of-the-barrel. Very poor.
I know I post this a lot lately, but search the Q45 forum for "oil filter." You'll find some good discussion and links to lots of good filter comparison studies (many with photos). Lots of info to be gleaned.