Effect of the test temperature and anti-oxidant addition on the oxidation stability of commercial biodiesel fuels

► Increasing test temperature, now fixed at 110 °C, maintaining induction period, is not viable. ► At high temperature the accuracy of measurements is reduced by additive evaporation. ► At high temperature, achieving induction period limit would imply using huge amount of additive. ► The previous use of the oil for frying processes reduced the stability of final fuel.