This is old family story, but still applies.
When my oldest son was on his last college year, I had nice Mercedes diesel who I wanted to sell. The older diesel did not have the performance newer do, but still back in 1990's 112HP car was delivering 35 mpg.
So I offer the car to my son, who politely declined the offer saying "Mercedes are for old people" and bought Mitsubishi 3000 with his own money (red, sport car).
So Christmas time few months later and son come home for visit. He ask me if he can take my Mercedes for night out with his HS friends.
I agree on the condition that he will fill it up.
So following morning we are all in the car going to Church and I see fuel gauge at 1/2, so ask my son if he fill it up day before.
"I did" was his answer and at that moment I figured out he filled it up before going with his friends.
1/2 tank on that car was making over 250 miles. How many times he would have to fill up his Mitsubishi that night?