The ratio of linoleic acid to palmitic acid (C18:2/C16:0) has been suggested as a indicator of the level of polyunsaturated fatty acids (PUFA) (Normand, Eskin, & Przybylski, 2001). Our results showed a decrease in this ratio, from 0.24 to 0.18 and to 0.17 during frying at 150 and 180 C respectively. De Marco et al. (2007) reported a reduction in the ratio, from 0.44 to 0.35, for palm oil heated to 180 C for 4 h and to 0.31 after 8 h. The lower ratios of unsaturated to saturated fatty acids affect the quality and shelf life of such oils.