That tiny arrow beside your car’s fuel gauge isn’t decorative; it tells you exactly which side of the vehicle the gas cap is on

A small arrow on the fuel gauge of your vehicle signifies which side the fuel door is located. This innovative idea was born from a Ford designer’s frustration back in 1986. Today, this simple symbol is a standard inclusion in cars, offering invaluable assistance to drivers who might be using an unfamiliar or rental car, thus saving time and eliminating the guesswork at the fuel station.