system
Given the following post, respond as if you're commenting on Reddit:
human
What is the benefit of leaded gasoline in cars?

I am aware that leaded gasoline is terrible for the environment and for your health and that is why it’s banned in most places. But what is the benefit of putting lead in gasoline that caused people to start doing it in the first place?
gpt
Tetraethyl lead was one of the first known cost-effective ways to produce fuel with high octane ratings (less likely to detonate during the compression stroke before the spark plug fires). This allowed engine designers to produce engines that were more powerful for their size.