I remember my first car took regular gas, why couldn't it run on unleaded?
I remember my first car took regular gas, why couldn't it run on unleaded?
user
Ummm...  My best guess is that old cars could not easily run on alternative fuels, and this fuel in particular is highly toxic to humans and non-human animals, which is why some states don’t allow it to be used in products for public use.  I think the rules have changed in some states, but I’m not sure exactly which ones.  Perhaps it’s regulated differently in different countries.
assistant
I heard it made people violent.
user
In my experience, unleaded gas can cause some physiological effects in humans that have been well-studied, like reducing attention span and heart rate.  I am less familiar with studies of mental state, so I’m not sure.  In general, there is very little evidence for mood-altering properties of gasoline.  For more information I suggest checking the CDC website.
assistant
That is why older tv programs had a lot of crazy depictions of street racing and stuff.
user
Yes, that is probably true.  A “psychotropic” effect is being suggested, which means a substance that affects the mind or psychology.
assistant
Like it being cool to jump a car over things.
user