2006: A B-52H flew a sortie using a blend of synthetic kerosene and JP-8 fuel in two engines and the conventional JP-8 in the other six engines. The test fuel was a 50-50 mix of traditional crude-oil and synthetic kerosene derived from natural gas. Air Force Undersecretary Ronald Sega flew aboard the flight to highlight the importance of the new fuel, which promised to reduce costs and greatly enhance deployability throughout the USAF. The sortie ended early when the left wingtip landing gear failed to retract properly.
