Electric discharge machining (EDM) is a contactless machining technique, broadly used for the machining of tough-to-cut materials like superalloys, ceramics, etc. Dielectric fluid used in EDM techniques plays a vital role in the machining efficiency of the process due to the variation in their thermo-physical properties. EDM process commonly involves kerosene oil, EDM oil, and water as dielectric fluids. These conventional dielectric fluids lead to the challenges such as low machining efficiency, emission of harmful gases, and operator’s safety. To overcome these challenges, various researchers used non-edible oils as dielectric fluid for the PMEDM technique. These non-edible oils show better machining efficiency and surface integrity on account of their superior thermo-physical properties over conventional dielectric fluids. Therefore, the present review work reveals the various researches work-done in area of PMEDM technique using cost effective bio-degradable non-edible oils as a dielectric fluid for the process.