- A type of jet fuel essentially similar to jet A-1 commercial fuels with a full military additive package. JP-8 is essentially highly refined kerosene. It is safer than JP-4, with a higher flash point, slower flame propagation, and lower vapor pressure. It ignites at 37.8°C, whereas JP-4 can be ignited at temperatures as low as −29°C.
Aviation dictionary. 2014.