The mileage ratings are made by a professional high mileage drivers, with no A/C. They have no relationship to 'real world' driving. My HEMI Magnum gets 13 in town and 16,17 on the hwy. If I remember right the mileage was rated at 16 city, 24 hwy. NEVAH HAPPEN!
The dealers wanted list plus $10,000. [over $40,000.] for the HEMI. 6 cylinder models were available at below factory invoice price. $17,000.
Found a dealer that wanted to move a car, got the HEMI at $2000 below sticker. Still over $30K, but before gas prices skyrocketed.
I remember, "All show and no go," way back in the 50's. "Lead sled" was another put down of under-powered lookers. The 'Frenched' headlights and taillights of the lowered 50 Mercury's were done with melted lead. Don't remember when Bondo and 'Green stuff' was invented.
Dan