Not picking on Amsoil, but a Good Bypass Centrifuge will collect more crap than a bypass filter. Size it right, it will even take out the soot.
A friend of mine put a Dieselcraft on his Cummins and kicked up his oil change interval to 15K.
Besides mine sounds cool when you shut down the engine.
Dieselcraft likes to sell their air compressor so you can put the return line any where.
On mine I ran a 1" hose all the way to the pan (yup over kill).
Last time I checked, even the new Health Care plan does not have a Gravity Tax yet, so it is still free.
Even Canada & Europe have not figured out how to tax gravity yet

If you want the cheap 55 GPH one I bought from PA Biodiesel Supply, you better move fast, I heard some of the other centrifuge companies are talking to their Lawyers. If they come out with a 25 GPH one, I may put one on my Wife's TDI or change my CRD over to the 25 GPH so it will rev higher, create more Gs and pull out more crap like soot.
When you want to get serious about the trans, put in a SunCoast double lockup clutch, clutch pack (that can handle 800HP), and the Stage 2 TCM mod. With the SunCoast in my CRD, I can now hear the tires with the lower engine vibration level that does not produce noise in the cab. Plus, I have to massage my Wife's back more since she does not get a vibration back massage when she rides with me any more.