Given the fact that the ZrO2 yielded 0% from the oil with free fatty acid and water content of 0.68% w/w and 0.089% w/w, respectively (figures below 1.0%) a base catalyst (K) was chosen for the study (Table 2). The FFA and water content in the oil was closer to other oil(s) [35] (crude roselle oil, FFA 0.67% w/w, water 0.087% w/w) with high yields from base catalyst [34].