Ancient advertisement for the 1950 Nash

More than 25 miles per gallon for that old barge?!!  Surely this was mere puffery, overstatement by some long defunct Madison Avenue ad agency?  A little googling brought up this piece contemporary to the time of the ad.  The comparison of 1950 vehicles yielded some surprising results.  Reading down a bit, it seems that the old Nash did indeed live up to the claims of the ad