The moisture and volatiles, free fatty acid, insoluble impurities, unsaponifiable matter, water content, and calculated iodine of the feedstock oils were determined according to American Oil Chemists’ Society (AOCS) standard testing methods, AOCS Ca 2c-25, AOCS Ca 3a-46, AOCS Ca 6a-40, AOCS Ca 5a-40, AOCS Ca 2e-84, and AOCS Cd 1c-85, respectively. The phosphorus content was determined in accordance with Association of Official Agricultural Chemists standard AOAC 984.27.