I wonder how burning biodiesel all the time helps keep the carbon cleaned off the glowplug tip? Im not an owner of one of these cars yet but am about to be. Im just a member now researching and learning. I am buying one because I have been making biodiesel for a couple of years and running it in my 1999 7.3 Ford SuperDuty. I would think running bio through the combustion chamber for a few months might actually help getting the glows to come out a bit easier. Just my thought. Ok, carry on.