Because it's a myth. It used to go around Reddit regularly. There's even a Snopes entry: https://www.snopes.com/fact-check/fuel-icon-foolery/ https://www.sno

Because it's a myth. It used to go around Reddit regularly. There's even a Snopes entry: https://www.snopes.com/fact-check/fuel-icon-foolery/ https://www.snopes.com/fact-check/fuel-icon-foolery/