In the case of aviation gasoline, because the vapor pressure is high, the vapor becomes higher than the explosion limit, so it is safe in normal operation without adding antistatic agent. Conversely, in Jet A-1 and JP-4, vapor is likely to enter the explosion limit, so it is considered that an antistatic agent is necessary. Conductivity of aviation gasoline, but it seems that it is almost zero because there is no antistatic agent.