Mody, you will get different views than mine on this one. Ilook at it like this, when you come back from the field, do you pump out your car's gas tank? Probably not. The differences are that the glow fuel will absobe moisture from the air and the nitro will evaporate off. That is in an open container. It will last a long time in a closed container. So, I have some little Dubro plastic fuel dots and at the end of the day, I pull the line off the carb and stick a dot into it, pull the line off the muffler and stick a do in it. If I'm going to put away a plane for a long winter nap, I fully fill the tank then seal it with the dots. That fuel is probably bettter after a few months than the half gallon jug stored for the same time. There is less air in the tank than the jug so less moisture.

Don.