I really want break this down. The have 106 miles to Chicago with a full tank of gas. The fuel tank in a 1974 Dodge Monaco 440 held 25.1 gallons (US Gallon). It’s EPA avg fuel economy (as per 1974) is 11.5mpg, but they are driving with heavy foot so I’ll give them an optimist 7mpg. That leaves them with 175.70 miles to empty.
They burned 60% of fuel in the total 106 miles traveled. I was bored.