Waste engine oil is generated by vehicles, industrial machinery, and equipment maintenance operations. Improper disposal can cause serious environmental pollution, but used oil also contains valuable hydrocarbons that can be recovered through specialized recycling processes. A waste engine oil recycling plant helps transform contaminated lubricants into reusable base oil, reducing waste and supporting resource conservation. Understanding the main stages of base oil recovery enables businesses to evaluate suitable technologies, improve operational efficiency, and make informed investment decisions.