reaction time of 40 min, and molar ratio of methanol/oil of 7.7:1, with a resulting product yield of 97% and FAME yield of 98.9%. However, in another study using orthogonal experiment design (Wu and Leung, 2011), the optimized conditions were: reaction temperature of 50 °C, KOH catalyst concentration of 1 wt.%, reaction time of 70 min, and molar ratio of methanol and oil of 8:1 with an achieved product yield of 95.8% and FAME yield of 98.4%.