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.
i have had used this product before. im with the biodiesel club from the hight school i go to.
the teacher and i bout a bottle of this dse and ran a batch as the instructions said, it ran in my 85 f-250 6.9 and his diesel car great. but when we used up all the dse oil we dicided to run a batch with out it, it ran great as well. we have probably made 1000 gallons of just used (filtered) oil + 20% diesel + 5% gas and have had no problems