I have started using a 50/50 blend of waste motor oil and diesel fuel in my 95 powerstroke. Filtered through a 10 micron primary filter and then a 2 micron filter before pumping into the tank. I only have about 300 miles use so far, but have noticed no difference in performance. It does smoke a little more though. Does anyone here have any experience using blended fuels? Is there a way to remove the carbon from the used oil easily? I am new to this sight but not new to diesels. Comments/Questions?