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Why do car manuals say to stop pumping more gas in once the nozzle clicks off? Is there harm in doing so? - Quora

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When pumping gas into my vehicle at a gas station, will the gas pump faster if I squeeze the handle with all my might, or should I just use the auto lock

How do gas stations keep track of people who come in and fill up their car but don't pay using the pump they pumped at, and then leave without paying for that