TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the method (I), the step of separating of the first FAME fraction further comprises increasing the oxidative stability of remaining FAME fractions when the remaining FAME fractions are used as a fuel. The method (I) further comprises: raising the temperature of the remaining crystallized FAME fractions so that remaining FAME fractions go back into a liquid, non-crystallized state; cooling the remaining FAME fractions to a second crystallizing temperature, where a second FAME fraction crystallizes while a third FAME fraction remains liquid; separating the liquid third FAME fraction from the crystallized second FAME fraction; subjecting the first FAME fraction to glycerolysis to form triglycerides of Omega -3 fatty acids; hydrogenating the third FAME fraction to create a mono-unsaturated FAME, where hydrogenating the third FAME fraction changes the Omega -6 FAME of the third FAME fraction into Omega -9 FAME; hydrolyzing the mono-unsaturated FAME to form a first fuel composition comprising (in wt/vol.%) 8C (1), 9C FAME (1), 9C (31), 10C FAME (31), 10C (6), 11CFAME (6), 11C (4), 12C FAME (0.5), 13C FAME (0.1), 15C FAME (0.5), 17C FAME (10), 19C FAME (4), 21C FAME (2), 23C FAME (1), and 25C FAME (1); and hydrolyzing the mono-unsaturated FAME and then combining the hydrolyzed mono-unsaturated FAME with the third FAME to form a fuel composition comprising (in wt/vol.%) 8C (1), 9C FAME (1), 9C (28), 10C FAME (28), 10C (20), 11C FAME (20), 12C (1), and 13C FAME (1). The first crystallizing temperature is -8 degrees C. The second crystallizing temperature is 5 degrees C. In the method (I), the liquid FAME fraction can be separated from the crystallized FAME fractions through a gradient density methodology or through filtration. The method (II) further comprises: hydrogenating the third FAME fraction to produce mono unsaturated FAME; hydrolyzing the mono unsaturated FAME to further produce a resulting fuel composition comprising (in vol.%) 8C (1), 9C FAME (1), 9C (31), 10C FAME (31), 10C (6), 11CFAME (6), 11C (4), 12C FAME (0.5), 13C FAME (0.1), 15C FAME (0.5), 17C FAME (10), 19C FAME (4), 21C FAME (2), 23C FAME (1), and 25C FAME (1); and combining the resulting fuel composition with the second FAME to form the second aviation jet fuel composition. In the method (IV): the first fuel composition is combined with the second FAME fraction to create a second aviation jet fuel composition (J2); the first FAME fraction is separated out from the remaining crystallized FAME fractions when the biodiesel is brought to -8 degrees C; and the second FAME fraction and the third FAME fraction are separated from one another when they are brought to 5 degrees C. Preferred Composition: The jet aviation fuel composition (J1) has freeze point of -54 degrees C and a flash point of 51 degrees C. Preferred Components: The first FAME fraction is an Omega -3 FAME fraction, the second FAME fraction is saturated FAME fraction, and the third FAME fraction comprises of ~-6 FAME and ~-9 FAME. The biodiesel is created from a feedstock having a Fatty Acid Profile selected to optimize the presence of a FAME fraction within the biodiesel, where the optimized FAME fraction contains at least one of Omega -3 FAME, Omega -6 FAME, Omega -9 FAME, or unsaturated FAME. EXAMPLE - No suitable example given.