If you travel much, you’ll probably end up in a few rental cars sooner or later. And if you’re anything like me, you’ll also probably forget to check which side of the car has the gas cap/door/cover thing until you’re finally pulling into a gas station. That can be an annoying moment as you try to guess which side to pull up on, but it doesn’t have to be.
That’s because on most cars, there’s a little arrow on the gas gauge indicating which side has the gas cap. It looks like this:
Forgetting to check which side of the car gets the fuel is certainly not the biggest deal in the world, though from my unscientific surveys it is a pretty common thing. Luckily, however, it’s also one of those minor things that’s completely avoidable thanks to these little arrows.
— Jim Dalrymple II