I’ve owned several A and B body Chryslers. All with small blocks. I just bought a superb condition, 2 owner 72 Scamp with a slant 6 with 60k original miles. I just returned from a 200 mile trip with that Scamp and averaged 28 miles per gallon !!!
According to AJ, that suck ***. His 11-1 - 367 cubes small block gets 32 mpg’s and does burn outs for a hundred feet, spins tires in second and chirps third.
Why back in the day, the government hosted a mpg contest. The slant 6 was always the winner. The best recorded mileage I remember the /6 getting was 34 or 36. Of course that’s a super tuned engine and a drive train to take advantage of it all in the lightest A body they could slam together.