The molar ratio of oil to methanol was 1:6 and the amount of the catalyst was 11.6% w/w (catalyst/(oil + methanol)).
At the beginning of the process, the FAME yield was very low
(2.5 wt.% after 1 h for the stirred reaction and 2.15 wt.% after 3 h
for the unstirred reaction), but later the rate increased