A biofuel usable as a diesel substitute, produced by the transesterification of suitable vegetable or animal oil. Biodiesel can fully replace diesel made from petroleum, but is more often blended with it in varying proportions. Compared to petrodiesel, biodiesel contains a minimum of sulphur, has a slightly lower heating value, and has fewer hydrocarbons or solid particles in its combustion products. Typical plants used for biodiesel production are rapeseed, sunflowers, soybeans, and oil palm.