It's a real word, but I did have to check the spelling on it.
Drawback I can imagine, but not sure if it's a real issue: With the "brewed" bio using the lye, heat, washing, etc... the byproduct is glycerin, which is removed and apparently makes a good degreaser... BUT, with this stuff on the "Diesel secret", from what I gather, all the stuff that makes raw veg. oil at room temp not suitable to burn and is otherwise seperated out it instead put into suspension, and passes through the fuel system.
Is it an issue? Maybe, maybe not. Rigs with the conversion to raw veggi oil pass this same stuff through their fuel system. Different injection systems respond differently to that. Some are OK with it, some aren't.
Just a WAG, but if the injection system on your diesel isn't recommended to work with 100% WVO, I don't "think" using this stuff would be a hot idea. I very well could be wrong.
I can say for sure that the p7100 pumps on the 12 valve CTD's doesn't give a damn what you run through it, since it's lubed and cooled by engine oil, not the fuel itself. Your engine may vary...
here's a quote from the GreenTrust website:
http://www.green-trust.org/biodiesel.htm
"Vegetable Oils are the best candidates for diesel fuels in diesel engines. Several vegetable oils have been tried as substitutes, but continued use of triglyceride fuels in the diesel engine has presented problems in fuel injector coking and crankcase lubricant polymerization. Both of these problems have been attributed to high viscosity of vegetable oil, which is approximately 10-20 times higher than petrodiesel. Higher viscosity causes the poor atomization of fuel in the injector system and poor spray pattern. Viscosity can be reduced by following four ways (a) By blending, (b)By transesterification, (c) By microemulsification, and (d) By pyrolysis. By using any of these procedures, appreciable amount of viscosity reduction and improved spray pattern can be achieved."