Rancimat induction time of palm oil (PO), several extra virgin olive oils (EV) and their binary blends have
been determined at three different temperatures (120, 130 and 140 C). Analytical composition and oxidation
stability of PO/EV blends were found to be a linear combination of the oil partners. Induction time
of pure PO was always higher than those of EV oils and blends, in which induction time increased proportionally
with the percentage of PO. However, induction time of 80% PO blend was similar to that of
pure PO. Fatty acid composition appeared to be the most important factor affecting heat-oxidation stability
and a saturated/unsaturated ratio near 1 was the optimally stable composition. Conversely, total
phenols had a zero or negative role on the oxidative stability of the blends. Finally, in heat-oxidised oils
significant losses of polyunsaturated fatty acids and formation of short-chain fatty acids were recorded.