Gas mileage 225 Slant 6

I get 17 mpg in my 72 FuryIII 360 2bl on cruise control set at 70mph original unrestoeed
1967DartSwinger said
I’m curious then,what would a 273,a 318 and a 360 with torqueflite get if driven normally? I’ve heard others say the V8’s do quite well if you keep your foot out of them
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