Microwave-heated pyrolysis of waste automotive engine oil: Influence of operation parameters on the yield, composition, and fuel properties of pyrolysis oil

► Microwave-heated pyrolysis of waste automotive engine oil was investigated. ► The process generates an 88 wt.% yield of gasoline-like oil product. ► The oil product contains valuable light aliphatic and aromatic hydrocarbons. ► The oil product contains low levels of sulphur, oxygen, and toxic PAH compounds. ► Feed rate, purge-gas flow, and heating source affect product yield and composition.