To make sure my glow fuel will stay good I take extra care to make sure the jug is sealed tight in between fuelings to reduce the probability of moisture getting into the fuel. I do a pretty good job because sometimes a lull in flying happens for a few weeks and my fuel seems just as fine as the day I opened the jug.

When done flying for the day I de-fuel the plane trying to get as much out of the tank as possible so it too doesn’t collect moisture and taint the next flight, whenever that may be.

Tonight I’m done flying, de-fueling my plane, the fuel pump is running in reverse and I’m tipping the plane to get all fuel and the clunk to one corner trying to get as much fuel. This point it’s mostly sucking air. I look at the fuel jug and it dawns on me that I basically aerating my glow fuel. So during this de-fueling process I’m super injecting something I try very hard to keep out… Moist air.

Any thoughts on this?