system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Other than efficiency, what does pumping premium gas instead of regular do?

I started pumping premium about a week ago and so far noticed better gas mileage and the response time almost feels better but I know absolutely nothing about gas and its effects. Thanks!
gpt
It doesn't improve any of that. You are probably imagining it. 


Basically, it's possible to do more aggressive engine design if you only use premium. If your car doesn't say it uses premium (usually sports cars) there is no benefit.