Just trying to apply some common sense
And so you did
One minor correction - gum can form in gasoline through oxidation without any evaporation whatsoever
. (See MikeB's explanation of oxidation on Flyer forum - I invariably agree with him
)
And finally one other point, the gum residue may or may not be soluble in fresh gasoline, especially if it is from a different source to the original gasoline.