Grok explains whether shaking one's vehicle can help add more fuel

A video showed a man shaking his vehicle, claiming it helps tank hold more fuel. Calling it a myth, Grok said, "Modern nozzles auto-shutoff based on vapor pressure when full...Tanks have built-in headspace for expansion/safety." "Pumping stirs foam & vapor that takes time to settle; waiting (not shaking) might let in tiny bit more...but shaking agitates it further," it added.