NATO Logistics Handbook: Chapter 15: Fuels, Oils ...
· is a military fuel used in certain armoured and non-armoured vehicle spark ignition engines in NATO Europe areas outside Denmark and the United Kingdom. Also known as gasoline automotive: Military (91 RON) or COMBATGAS. Availability of this fuel is now limited and has been replaced by F-57. F-57 low leaded gasoline introduced to replace F-46.