6 banger mileage?

DouglasMB said

ok I know this might be a really dumb question but would it matter what size Carb you have? I just got a 1965 dart for my son and we were wondering about gas milage. I told him as long as he is getting good grades I would buy him one tank of gas a week... after that it was up to him and his friends... he asked me what kind of gas milage it got and i told him it should be really good. but hell honestly i do not know.
its a charger 225 not that I think the "charger" means anything with a 1 brl carb. My brother got a rebuild kit for the carb and it fired right up. So i am seeing here just as an average 15-18 city if its in decient shape? but would the carb make a difference?

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Yeah Carb matters but Carb condition matters more. Yours is most likely a 1bbl Holley 1920...which is a good carb as long as its not remanufactured.

The Charger means nothing. Dodge slant sixes had a "Charger 225" sticker and Plymouths had a "Super 225" sticker.

There are various things you can do to get it better mileage before spending a bunch of money. Tune the carb with a vacuum gauge to make sure you're pulling the most vacuum. Also do a valve adjustment because chances are its never been done or hasn't been done in a long time and the valves are tight. Check the timing and put it at 8* btdc or so as long as the engine doesn't ping. Readjust the idle to specs and have him drive it for a week and see what you get on the next fillup.