Abstract: A method for improving the combustion in a gun type oil burner, a new circular air plate assembly for a gun type oil burner, and a method for assembling a circular air plate assembly for a gun type oil burner barrel is disclosed. The air plate assembly comprises an inner air plate having a plurality of pairs of holes therein, and an outer adjustable control plate contiguous therewith having a single large hole corresponding to each pair of holes of the inner air plate for forming two incoming columns of high velocity air, one parallel to a centrally positioned fuel nozzle and the other parallel to a spiral around the fuel nozzle for combining and integrating the two incoming air columns into one large outgoing well-mixed turbulent substantially straight column of air for improved combustion by the igniter.