copper strip corrosion result gathered with the produced methyl esters were the lowest level of corrosiveness (No 1). Oxidation stability of biodiesel is worse than petroleum diesel fuel. Therefore, biodiesel ages more quickly than petroleum diesel fuel. The oxidation stability of produced methyl esters were not added to Table 5. Because, the oxidation stability of the methyl esters were determined according to PetroOXY’s Rapid Small Scale Oxidation Test (RSSOT) ASTM D7545 method which has been approved but not incorporated into ASTM fuel quality specifications. However, the oxidation stability of COME, CFME and FOME were about 0.11, 0.12 and 0.2 h respectively. On the other hand, the oxidation stability of diesel fuel was about 1.5–2 h. The cetane number of a fuel shows the tendency of that to self-ignite. Minimum cetane number of biodiesel is identified in ASTM D6751 as 47 while it is identified in EN 14214 as 51. The cetane numbers of the produced methyl esters fulfilled both biodiesel standards. The heat of combustion is a measure of the energy available from the fuel. It is used for estimating the fuel consumption compared to petroleum diesel fuel (Rashid et al., 2009; Demirbas, 2000). The heat of combustion values of the produced methyl esters were around 40,000 kJ kg1 which was slightly lower than that of petroleum diesel fuel. Water in the fuel builds up corrosion, and microbiological growth may occur at a fuel-water interface. The ASTM D6751 and EN 14214 biodiesel standards confirmed the highest water content value for biodiesel of 500 ppm which were accomplished