Where You Going, City Boy? 1978 Plymouth Volare Wagon

Could the '78 Plymouth Volaré station wagon really get 25 miles per gallon on the highway? And how about that "big-car comfort" mentioned in this ad? It might be tough to go from, say, a 1970 Chrysler Town & Country to one of these things, though at least you could get the Slant Six in a Volaré.