system
A chat on subreddit /r/wallstreetbets
human
why would you use anecdotal mpg for one car and listed mpg for another? wtf?

gpt
The post I responded to stated there was  $50k in savings with a 15mpg difference between Civic and Prius. So if my example used 50mpg for the Prius then we can do some tough math and say 50-15 = 35 mpg for the civic. 
  
 Obviously my numbers were not meant to be concrete and were simply used as placeholders to show a 15 mpg difference would be not be anywhere near $50k in savings.