More than you ever wanted to know about oil filters

[Mike88se]

Its likely the best testing we're going to get. The people who make the filters aren't going to test and compare comprehensively. Mobil posted some tests they performed against other filters but they used the lower end filters of every company they tested against... and still lost to one. The companies won't even tell you what the micron numbers mean in context. Some will give a micron rating but they don't provide the info that would make the rating really mean something... like the efficiency rating of filtering micron sized particles. Like said... this study just gives some info that may be helpful... more helpful than anything you'll get from the filter companies
Oh wait I take it back... Baldwin filters gives some info.
Baldwin Filters | Product Highlights