First time I've heard of that convention.
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/
alt Hacker News
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/