The following conclusions are obtained. The microwave pyrolysis process is found successful in the recycling of the waste engine oil.

Microwave-heated pyrolysis offers an exciting green approach to the treatment and recycling of automotive engine oil. Both

N2 and waste oil flow rates were found to have effects on the fraction of original waste oil converted to pyrolysis gases,

pyrolysis oils, and residues.. At the highest rates of N2 and waste oil flow rates, the amounts of alkanes and alkenes

increases while the amounts of naphthenics decreases. At the highest rates of N2 and waste oil flow rates, the amounts

of alkylbenzene increases while the amounts of benzene, toluene and xylene decreases.