Here’s something I’ve never been able to remember: when I rent a car I forget to notice which side the gas cap is on.
For the rest of my trip, I don’t think to look. I only think about it when I’m driving and it’s time to fill up the tank. I try to use the side view mirrors to see which side the gas cap is on. It never works. Then I look at other cars on the road, hoping to spot one that is the same model as mine so I can see which side the gas cap is on. Unfortunately, I’m car blind in the way that some people are face blind, so that usually doesn’t work. I usually end up driving to the pump and finding out if I got lucky.
But last month someone I met at TED told me (and I apologize to the person who told me, because I can’t remember who told me) that most late-model cars have a little arrow on the gas gauge that points to the side of the car with the gas cap. This information has changed my life.