a 67 ford galaxie 289 ci two barrel carb, three in the tree with electric overdrive trans will get you right at 20 mpg. big four door party barge, vdub gas milage made many a concert with that car, a local gal had a red camaro 1975 with a straight 6 auto trans she was getin over 20mpg the car gave up after 300,000miles that girl was tight with money, i know she drove it over 30 years !always wondered what the galaxie would have got with a 6 cyl ford.ever chance cindy got she would ask about my milage and poke about the family car ,