system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why isn't the gas tank fill port standardized to be on the same side for every vehicle?

Wouldn't making the port be on the same side for every car make getting through gas stations more uniform/efficient? Seems like this would be a no-brainer. Is there some practical reason why they aren't?
gpt
Simple engineering. There is no uniform standard, so automakers move it around based on what's best for the design of the vehicle. Older cars can have gas caps behind the license plate, to accommodate gas tanks below the trunk.  

The location of the gas tank is a big challenge when designing cars, especially more compact ones.