I said variations in QUALITY, not "on paper" SPECIFICATIONS... Storage methods, storage time and so forth changes QUALITY of fuels around the world. Avgas included.Marcvini,
Why in the world would you think 100LL has variations around the world? It either meets the international specification or it does not. Same thing with jet fuel. It either meets the specification or it does not.
Compare this to automotive fuel, either gasoline or diesel. The specification is set by each country. That induces huge variations around the world.