the AIIB report states that military aircraft use a fuel additive that lowers the freezing point of water in the fuel.
Does anyone know why this is not used on civil aircraft.
From memory, it's diethyl glycol monoethyl ether. If it's less than 0.02% by volume, then the fuel supplier doesn't have to seek agreement of the customer. However, if it is agreed that it is used, then the concentration is supposed to be between 0.10% and 0.15% by volume.