Why topping off your gas tank is a bad idea

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Is It Bad to Top Off Your Gas Tank?

Never top off your tank

Reasons To Avoid Topping Off Gas Tank

If I try to fill my car gas tank with gas and can only do it very slowly even though it's empty, what could be wrong? - Quora

Symptoms of Water in a Car's Gas Tank and How to Fix it – Gold Eagle

The dangers of overfilling your gas tank - CNET

Don't top off your tank after the gas pump shuts off

In defense of topping off - The Show - Car Talk Community