In article , "Tamas Feher"
wrote:

Why would a cheap subsonic jet trainer need an expensive
low-volatility fuel (JP7) typically associated with the SR-71?

Typically? Airliners used to use the JP7 up until it was banned for
being hazardous. Rumor says some african countries still sell it at
their airports.

I think you need to check your facts on JP-7.

--
Harry Andreas
Engineering raconteur