I don’t know when I learned this trick, but it was many years ago.
Have you ever rented or borrowed a car and had to stop for gas, but as you’re driving up to the pump you suddenly realize that you don’t know if the gas tank filler is on the left or right side? I’d say there’s a… 98% chance that has happened to everyone. And with the popularity of the Toyota Prius and Chevy Volt, which gives people much longer time between fill-ups, even those car owners probably forget which side the gas tank is on!
So, here’s a the tip that seems to be true for most cars from the past… 20(?) years:
Next to the gas pump icon is an arrow that tells you which side the filler spout is located.