In recent years, interest has been focused on gasoline-rich engine fuel production from renewable sources. Possible acceptable recycling and re-refining processes of vegetable oils are cracking and pyrolysis. Pyrolysis is a common practice and an effective method for recycling waste disposal. The properties of an important part of the liquid products obtained from catalytic pyrolysis are similar to gasoline. Compared with transesterification, pyrolysis process has more advantages. The liquid fuel produced from pyrolysis has similar chemical components to conventional petroleum diesel fuel. The higher heating value of pyrolysis oil from a vegetable oil is slightly lower than that of gasoline, diesel fuel, or petroleum, but higher than coal.