You’ll never wonder which side the gas cap is on again…
The next time you’re driving an unfamiliar car (like a rental), take a close look at the fuel gauge. You’ll notice a small triangle on one side of the gas pump icon.
It’s telling you which side of the car your gas cap is on.
Now, this trick won’t work with all vehicles… But all newer cars (the ones you’d get as rentals) have this indicator on the dashboard.