The experiments were conducted at temperatures of 300400 C, pressures up to 41.1 MPa, methanol to triglyceride molar ratios of 3:1 and 6:1, and reaction times from 2 to 6 min. The results show that the transesterification process to produce biodiesel from low-cost lipid feedstocks with low excess of methanol and without glycerol generation is technically feasible. Since thermal decomposition of chicken fat at these temperatures is an important issue to be considered, batch experiments with emphasis on this aspect were also carried out. It was found that the thermal decomposition of chicken fat was not significant if heated up to 350 C which will permit preheating the feedstock up to this temperature in a more practical flow process.