[shovel]

I owned a '73 Duster - not the "Feather" duster but it had a 225 /6 with an RV cam that the previous owner had installed "for more bottom end", he said. It had a 3 speed auto and cruised at 30mpg any time I was on the highway - seriously not bad for a vehicle that size/era.

Also had an 81 Escort (4 speed manual) and an 81 Plymouth Champ (4 speed manual, but with a 2-range overdrive) - both returned 45+ mpg on highway trips, I didn't spend much effort calculating mpg around town. I didn't spend much effort calculating mpg at all, really, but when the gas gauge broke on the Escort I compensated by watching the odometer, 450 miles meant I was close to empty and needed to put another 10-12 gallons in.