Topping any such list is the 1923 Copper-Cooled Chevrolet, which was the last air cooled car made by Chevy prior to the Corvair. GM had to recall all of them and then destroyed almost the entire run;
The 1974 to 1979 big Fords (LTD, T Bird, Torino and their Mercury counterparts) which were ugly, seldom got over 10 mpg…