Dunno if this is true, but its
on the internet.
w
v
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http://tywkiwdbi.blogspot.com/search?updated-min=2012-01-01T00:00:00-06:00&updated-max=2013-01-01T00:00:00-06:00&max-results=50
And a link there led me to this tip at Life123:
Did you know that gas pumps have three different speeds? Most pumps have slow, medium and fast. Most people insert the pump into the car and then set the handle so that they don’t have to hold the pump. Gas stations want you to do this because you are actually getting less gas this way-slow pumping reduces the vaporization of the gas. Take the extra effort to hold the pump at the first setting (slow), and you’ll get fewer vapors and more gas for your dollar. Try squeezing the handle about a third of the way to set it at the slowest setting.
You learn something every day.