The purpose of this work was to study the power of PE added at different concentrations to refined olive oil during deep frying at 180 C for up to 12 h. Its efficacy was also compared to that of refined olive oil containing BHT at concentrations of 100 and 200 mg/kg, as admitted by EU and US Regulations, respectively (EU Official Journal of the European Communities, 2011; U.S. Food and Drug Administration, 2013), and to an EVOO with a naturally high phenol content, by monitoring the evolution of tocopherol and secoiridoid derivatives, the typical frying oil volatile compounds and the oxidised phenols.