It's not common for people who's budget doesn't allow for a full tank. My family usually just put in a certain amount. 10-20$. When I visit home, I make sure to

It's not common for people who's budget doesn't allow for a full tank. My family usually just put in a certain amount. 10-20$. When I visit home, I make sure to fill up their tanks in secret and they look at me like I'm insane. "Who fills up a tank?!"