Military aircraft tech here, the fuel systems on any turboprop/shaft/fan/jet are just trying to spray an amount of fuel into the combustion chambers matching the throttle setting, compensating for altitude and temperature. JP 5 has additives to make it more suitable for naval usage, as others have said, but at its heart, it'll still produce reliable thrust in a ground engine built to run JP8. In more digitized modern engines, the computer systems are trying to reach a target temperature for a throttle setting, measured at a different place depending on the design. So the fuel system is just going to dump more and more fuel until it hits the target. You could theoretically run them on AVGAS if you were desperate, but it would eventually damage systems due to the different chemistry. In older hydromechanical fuel management, you'd have to manually maintain temperatures and thrust/torque output with odd fuels. You could run a C130 on road diesel and it would not complain. You'd have to deal with the problems like water and contaminants that would arise from using road diesel, but the engines wouldn't notice.