How its made: GASOLINE. Found this this weekend. Educational film from the 1950s, one of the best explanations for petroleum refining I have seen yet. The refining technology hasn’t really changed that much since this was made, just better monitored and more precisely controlled via computers now. This is also how they get diesel so I guess that’s train related, and there is a train in the video 
It’s not OT - there is a train at 3:18
Thanks, that was very interesting!