10000 degres
Cost, it's less efficient than ULSD, conversion to biodiesel is expensive, it gels more easily than ULSD does.
A diesel engine is a biodiesel engine. If you have a diesel engine, you can fill it up with biodiesel anytime.
As any fossil fuel biodiesel burn and release heat.
Microwaves heat only 3 things. Liquids, Fat, and Sugar. Liquids and Fat are the most easily heated. If you are trying to heat oatmeal with no water or anything, it will not heat up because it does not contain much Fat or Water so it will not heat up. Just like trying to heat up a napkin.
Biodiesel
biodiesel = el biodiésel
Yes it is safe to mix petroleum diesel and biodiesel. Blends of biodiesel and petroleum diesel are designated "BX." Where "B" states that the fuel mixture is a biodiesel blend and "X" indicates the percentage of biodiesel in the blend. For example, common blends of biodiesel in North America include B2 (2% biodiesel), B5(5%), B20(20%), and B100(100%). B100 is also know as "neat," or pure, biodiesel.
Wikipedia provides an excellent encyclopedia style article on biodiesel fuel. Other websites that offer information about biodiesel fuel are the U.S. Department of Energy's Biodiesel page and the National Biodiesel Board's page.
Yes, you can buy a hybrid that uses biodiesel but they are much harder to come by than hybrids that don't use biodiesel or biodiesel cars that aren't hybrids.
the biodiesel should be used in the diesel engine, and there are some biodiesel motorbike has been produced such BWM http://www.doinggroup.com/
Heat flows easily in a good thermal conductor.