One of our fleet vans wen't though a drive-in lube joint and was given a Luber-finer filter and whatever bulk barrel oil they used. When I later changed the oil myself it was remarkable how clean the oil was on drain, and the van was 1000 miles overdue. I'm used to seeing the oil come out of there like black pitch with the no-name filters we usually get at lube shops. The filter was freaking heavy when I took it off too and the build quality seemed about par with the Napa Gold I put on. I'm guessing the clean oil effect was largely in part of the Luber-finer filter. Never seen or heard about Luber-finer, are they a good filter?