Used it in high school. One OZ made 16oz, so It would fill a tank, easy. Some of the others in the camera club would add one fluid oz of Powder sodium sufite which the claim was it allowed shooting Tri-x at 1600. Back in those days my Camera was an EXA with a top shutter speed of 1/150 of a second so I did not want to experiment in that direction.
Should note that the last bottle I bought, they used a fancy "falcon" measuring bottle which allowed one to measure out the developer using a compartment on the bottle. the developer in that bottle failed rather quickly, presumably for air infiltration.