yea DSE is a "snake oil", but the company does show a person how to get started blending. Craig on TDR who I reffered to earlier had the stuff chemically anaylized and will tell you what it is. Like I said, he, nor I, use DSE anymore. But I do blend as I feel it's safer than home brewing true biodiesel, and so far have had no problems. Now though, that was a 1st gen CTD but now I'm playing with a '99 P-stroke, so we'll see what happens. Worse comes to worse, I buy a new injection system, maybe re-ring, so what; all of life's just an experiment anyways.
Hey though, for some really good reading, google "schur ecofuel". A German who's been blending oil since I believe the '40's. And you remember what else the German's gave us, right? that's right, the base engine we all know and love.