As for the energy crisis is a problem that multiplies the violence in now, many researchers attempt to seek the new alternative energy upwards to the petroleum fuels replacement. This research aims to studies thermal cracking and catalytic cracking of used plastic, used vegetable oil, and used lubricating oil to gasoline as a liquid fuels for vehicles in a continuous reactor for study the affected of variable such as temperature, hydrogen flowing rate, and flow rate of feedstock which composed of used vegetable oil, waste lubricating oil and polypropylene in the ratio of 0.70 : 0.10 : 0.20 respectively. Liquid products were analyzed by simulated distillation gas chromatograph and the product distribution were obtained. At the condition of 550 oC, hydrogen gas flowing rate of 5 ml/min, feedstock’s flowing rate of 1.23 gram/min over 5% Fe/AC shown the highest yield of gasoline amount of 50.95 wt%, kerosene 10.38 wt%, gas oil 21.68 wt% and long residue 16.99 wt%. Therefore the liquid product were distillated by boiling point of gasoline fraction (IBP - 200 oC) the synthetic gasoline were obtained. The testing results of gasoline on engine testing unit providing that the speed, maximum power and efficiency little lower than the premium gasoline octane number 91.