In the summer of 1969 I came close to buying a bright yellow Plymouth SuperBee with a 383 engine. But at that time I was getting disconcerting letters from my draft board so I decided,instead,to join the Army to get a better deal than I would have had as a “US” (draftee).
My mpg isn’t quiet that bad but it’s usually around 11 or 12 in town
My 23 model SS naturally aspirated 6.2 V8 has cylinder deactivation and manages 28 on the HW