Autoxidation of a thermally stable JPTS aviation fuel has been studied at 185 degrees C in a single-pass heat exchanger by monitoring the disappearance of dissolved O-2 as a function of reaction time. All measurements were made in a single liquid phase at elevated pressure. We report empirical changes in autoxidation caused by (1) introducing a hindered phenol antioxidant (BHT), (2) adding a phenylenediamine antioxidant mixture (A0-24),(3) introducing natural fuel inhibitors in the form of a straight-run fuel, (4) adding selected combinations of the above antioxidants, (5) varying initial O-2 concentration, (6) diluting (1/1) with a paraffinic solvent, and, finally, (7) introducing dispersants.