I'm intrigued by the idea of centrifugal oil filters. Looking online, I found one made by Dieselcraft: http://www.dieselcraft.com/CentrifugeTestimonial.php as well as some from PABiodiesel: http://pabiodieselsupply.com/shop/oil-centrifuge-c-79.html However, these all appear to be rebranded MANN+HUMMEL centrifugal units: http://www.mann-hummel.com.sg/EN/centrifugal/model.html The primary concern with choosing the right size unit would be if your engine's oil pump is capable of supplying enough flow and pressure to operate the centrifuge without starving the rest of the engine. In my case, I have a Mercedes OM617 (the turbodiesel used in the 300D) which I've transplanted into a '67 Chevy pickup (see http://www.peachparts.com/shopforum/diesel-discussion/241922-project-gm-benz-has-begun.html ). So it looks like their smallest model (the FM016) would be a good fit. http://www.mann-hummel.com.sg/EN/centrifugal/fm016.html Is anyone else running a centrifugal unit? I've searched the forum and found mention of the FM016, but no posts about anyone actually using one. I found a MANN+HUMMEL distributor in Texas and have sent them an email about ordering a unit, price, price of the disposable cartridge, etc.