TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method further involves drying the feedstock prior to the step of introducing, such that the feedstock has less than or equal to 0.5% (preferably less than or equal to 0.1%) water. The step of drying comprises heating the feedstock while under pressure of less than or equal to 1 atmosphere to remove water. By refluxing the feedstock, a reaction mixture is formed that undergoes both cracking reaction and decarboxylation reaction to form the light oil fraction. The step of separating the light oil fraction from the remainder of the feedstock comprises condensing the light oil fraction. The light oil fraction is separated from the reacting mixture by use of vapor/liquid separator that: cools vapor rising from the reacting mixture to temperature below 250 degrees C; returns condensed liquid to the processing system; and allows uncondensed components of the vapor that was cooled to temperature below 250 degrees C to pass through cooling element of the vapor/liquid separator and the uncondensed components, after being exposed to condensation conditions, comprise the light oil fraction. The predetermined temperature is at least 300 degrees C (preferably 300-400 degrees C) and predetermined rate of less than or equal to 70 degrees C/hour. The processing system is catalyst-free or the method may involve adding at least one catalyst to the processing system. The predetermined rate is constant throughout the step of heating the feedstock. The method further involves extracting the feedstock from a biological organism. The feedstock has a feedstock mass and greater than or equal to 20% (preferably greater than or equal to 40%) of the feedstock mass is converted to the light oil fraction within 10-24 hours of starting the step of permitting the feedstock to reflux; or greater than or equal to 30% of the feedstock mass is converted to the light oil fraction within 6 hours or greater than or equal to 60% of the feedstock mass is converted to the light oil fraction within 30 hours of starting the step of permitting the feedstock to reflux. Preferred Feedstock: The feedstock comprises at least one of virgin oil, animal fat, yellow or brown grease. The feedstock comprises oil selected from corn oil and/or oil from algae, bacteria, seaweeds. The feedstock consists essentially of fatty acids and triglycerides. EXAMPLE - No suitable example given.