Fuel  Type Heat of Combustion kj/kg Specific Gravity Diesel Fuel Sun Flower Biodiesel Cotton Seed Biodiesel Soya Bean Biodiesel Rape Seed Biodiesel Pawpaw Seed Biodiesel WCO 43350 40579 40580 39760 37620 45342 45479 0.815 0.878 0.874 0.872 0.914 0.867 0.858 (Doysan, 1999; Paksoy, 1999; Recep Altim et al., 2000, Owolabi et al, 2011 (This Study)

Table 4: Heat of a Combustion and Specific gravity of other vegetable biodiesel fuel compared to WCO biodiesel fuel.