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While gasoline vapors are supposed to be heavier than air, I wonder why I can smell vapors when I am filling. I don't crouch to the ground or anything. There are some light ends that are released when gasoline is warm. I think a good reason that fridges don't start many fires is that they are normally a fair distance from the fill point and the ambiant air disperses them. Gasoline stored in underground tanks is probably a bit safer than that stored in above ground tanks because of the temperature. Gasoline and all hydrocarbons are less volatile under cooler temps. I agree that cell phones, and even more so, static electricity, are more likely a fire than a fridge. Good thing a lot of us use diesels when pulling.
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