Not too hard to get some data that works ok:
1958 Edsel Ranger 2-Door Hardtop specifications & performance characteristics
Fuel consumption and mileage: official: , average estimated by a-c: 24.3 l/100km / 11.6 mpg (imp.) / 9.7 mpg (U.S.) / 4.1 km/l .
http://www.webstreetcars.com/carblog...ankruptcy.html
This car had an average fuel efficiency of 15.2 miles per gallon.