I've driven a staggering number of cars and trucks for fieldwork. Compacts rented from the airport, box trucks with missing side mirrors, university department beaters...
But it took me until a few months ago to realize something basic: all cars have a little arrow on the gas indicator that shows what side of the vehicle the gas cap is on.
So after years of driving to a gas station and looking like an idiot while I try and figure out where the gas cap is, now I can just read the dashboard.
My question is, am I the last person to find out about this? Or is this new to you, too?