Biodiesel is a distillate type of fuel used for "compression ignition" engines (in diesel engines that are compressed in the air induction step. The compressed air creates high pressure and heat so that it can burn diesel fuel sprayed by the injector) whose fuel quality is indicated by the Cetane Number. The higher the Cetane Number, indicates that the diesel oil is more flammable, and vice versa.
Biosolar users in general are for fuel in all types of diesel engines with high rotation (above 1000 RPM), which can also be used as fuel for direct combustion in small kitchens, where clean combustion is especially desirable. This type of diesel is also called Gas Oil, Automotive Diesel Oil, or High Spees Diesel.