You can fuel a Humvee with JP-8, which is jet engine fuel. It's been a long time, but I remember there being problems if you switched fuels -- if you had been u

You can fuel a Humvee with JP-8, which is jet engine fuel. It's been a long time, but I remember there being problems if you switched fuels -- if you had been using regular truck diesel and switched to JP-8 you could have engine problems because you'd still have some residual truck diesel mixing with the JP-8.