In this paper, we report the application of the advanced distillation-curve (ADC) approach to the gas turbine fuels Jet-A, JP-8, and JP-5, in order to obtain information about the variability of these gas turbine fuels. The measurements of the ADC derived temperatures T-k and T-h provide volatility information as an approximation of the vapor-liquid equilibrium, VLE. The composition channel of the advanced distillation curve provides access to more detailed insight into the fluid behavior. Finally, we have shown how the composition channel allows the combination of thermochemical data with the temperature data of the distillation curve. The variability in distillation curves and calculated heat of combustion between jet fuels is significant. Understanding of this variability is critical information for a more effective and reliable thermophysical property modeling system.