Most people will go their entire life without ever knowing what the little arrow next to the gas gauge actually means

The arrow next to the gas gauge serves a singular yet crucial purpose: it indicates which side of the car the fuel door is on. If the arrow points to the left, the fuel door is on the left side of the vehicle; if it points to the right, the door is on the right. This simple indication can prevent a lot of frustration, especially when driving a car that is not your own.

Although it may seem like common sense to those in the know, many drivers remain unaware of this feature. The arrow is a subtle design choice that provides immediate information without the need for conscious thought or memory, making it a perfect example of intuitive design in automotive engineering.

The introduction of the fuel door arrow was driven by a need to enhance convenience and user experience for drivers. As the automotive industry became more globalized, manufacturers recognized the importance of standardizing certain features to accommodate drivers who may frequently switch between different models and brands.