I may be a little late in the debate but I attended the National Biodiesel Conference in February.
It is true that "Back yard" biodiesel gels at a low temperature, and needs to be preheated for use. Once the biodiesel gets to about 140 degrees it is very safe to use in engines and most studies show that if done properly will actually increase the life span of an engine
due to its lubrication properties. And yes it does take a toll on fuel
Professional grade biodiesel is makeing some huge changes. Europe
is going toward all biodiesel very quickly, much quicker than we are in the US. Most of the US biodiesel production is being exported.
With professional grade biodiesel gelling, or freezing is not as much of a problem. There are companies that are producing biodiesel that does not freeze until about 14 degrees F, or -19 C.
Looking at the discussion, and from my experience, I am very disappointed in the US on this subject. We are usually the leaders, and the innovators in new technology. We obviously have a problem with our dependence on oil
. So why are we havening such a difficult time accepting such a good solution to our problems?