What's the best fuel mileage you ever got in your Charger?

[odcics2]

1968 w/ 318 - 904, 2.76 gear...   bumped up timing 2.5 degrees, zip tube to get cool air from the battery hole in the rad support. Dropped front end.  Front spoiler. Steady 55 mph to Indy and back from Detroit.  This was in 1975...  speed limit was 55 on the Interstates.   So, highway only mileage was 27.2 mpg.
Spark plug color was the perfect tan tone !

[69_500]

Last trip in the 500 this year netted a 19.2mpg. That is now a stock 440 with 2.76 gears in the back. Oh and finally went up to 15" rims with 225/60