The Air Force currently spends approximately $10 million dollars annually on fuel support for the U-2 aircraft. The U-2 has used a jet fuel known as JPTS since the aircraft's development in the 1950's. JPTS is a specialty fuel used only by the U-2 and is produced by two oil refineries in the United States. As such, it has limited worldwide availability and costs over three times the per-gallon price of the Air Force's primary jet fuel, JP-8. Recent research performed at the Air Force Research Laboratory Propulsion Directorate suggests that additives could be added to JP-8, which would make it a suitable low-cost replacement for JPTS. The additive-enhanced fuel has come to be known as JP-8+100LT. | Jp-8+100lt by Christian G Simms, Paperback | Indigo Chapters