Hi, did a google search based on a testimony given on the DSE website. Here's what I found:

http://www.usc.edu/CSSF/History/2006/Projects/J0203.pdf

It seems at least one of the testimonial accounts can be supported by a little digging. I would assume more could be learned by looking a little farther into the site.

I would think that people who call it snake-oil would want to know what DSE is using so it could be verified without having to spend any money (a big part of the reason we want alternative fuels anyway, cause we're cheap!), but we have to remember that we are in America, the land of the almighty dollar. I don't fault them for keeping their ingredients a secret, they have to make a living somehow. Lord knows that OPEC countries are sticking it to us! You can buy a starter kit for $40 (less than 10 gal diesel) and get enough to make 150 gal of fuel from WVO, which certianly enough of us alternative fuel types all know burns anyway. My two cents.