20mpg doesn’t really sound that far fetched for a 305 if you’re mostly doing highway. Mine was a '78 and got around 14 in the city when just commuting. That thing could drink a lot more with a heavier foot though, lol
For a 350 to get 7mpg it would have to be a race built engine or simply run like garbage. I don’t even know how you could get a 305 to get that poor mileage but 🤷♂️
A V8 has a lot of low RPM torque so if you drive with a light foot it can do very well. Most of the energy from an engine is used moving the car, not engine losses. A smaller engine is always going to do better at the same load, but the difference isn’t going to be large if everything else is equal (which it often isn’t)
…he was lying to you?
20mpg doesn’t really sound that far fetched for a 305 if you’re mostly doing highway. Mine was a '78 and got around 14 in the city when just commuting. That thing could drink a lot more with a heavier foot though, lol
Maybe yours was a 350?
For a 350 to get 7mpg it would have to be a race built engine or simply run like garbage. I don’t even know how you could get a 305 to get that poor mileage but 🤷♂️
I think you probably could get a 350 down to 7mpg but you’d be driving like an absolute maniac to get it there. I dunno, 7 seems pretty bad
A V8 has a lot of low RPM torque so if you drive with a light foot it can do very well. Most of the energy from an engine is used moving the car, not engine losses. A smaller engine is always going to do better at the same load, but the difference isn’t going to be large if everything else is equal (which it often isn’t)