What's the absolute maximum range of your Duster?

cruiser said
Today I ran my Duster out of fuel, then completely filled the tank and filler neck with gas. I was able to put 15.1 gallons in. My tank is a new 16 gallon tank. How many gallons does your completely empty Duster take? There must be an air bubble at the top of the tank that prevents the tank from being completely filled. By the way, completely running my tank dry gives me a range of 227 miles, calculated at 70 mph and 14.7 mpg. How far will your Duster go on a tank of gas. I'm surprised at how little range my car has. What do you think?

I guess I don't know what your combo is, and why 14.7. What gears, what converter, what engine, how many carbs. 440 w/ 3.91's ? slant six with 2.76's? The only classic (and some at the time weren't really classics but now they are..LOL) cars we traveled in that got that kind of mpg was just recent. Our '77 Ramcharger Full Time 4x4 360 4bbl with 3.55's got 13 mpg on just about a 4,000 mile trip, and last year our '77 Dodge Van tradesman 318 2bbl got 14 mpg on about a 1200 mile trip. I think I'll get the Van better for this year after I pull the heads and re-work them. Again, you must have a wild child to be at 14.7 mpg in a A-body. Or, leaving marks at every stop ??? LOL