The aim of this research was to find the appropriate engineering solution for plastic processing technology. It is an effort to produce renewable energy source as alternative energy and alternative fuel. The oil processing has been done through pyrolysis. A variety of temperatures in reactor were investigated, which were 300°C, 350°C and 400°C. The results of LDPE plasticizer at 300°C reactor temperature generated lower amount of plastic oil clearer color, and higher amount of solid residue in compared with the yield of 400°C reactor temperature, which obtained higher amount of oil and lower amount of solid residue. The tests investigated the generator with a variety of loads, which were variation of gasoline and plastic pyrolysis oil mixtures at 300°C, 350°C and 400°C. The most economical fuel consumption was 300°C of LDPE plastic oil. It required 13.5 minutes with 75% gasoline + 25% pyrolisis oil, while load generator was 150 Watt. In overall, the calorific value and variation of gasoline and pyrolisis oil mixture is very influential on fuel consumption and duration length of the generator.