Not sure about "one of the highest" claim... Seems like those numbers do not support that.
Should have said "was".
Engine technology of course has moved on for priorities on economy.
If you compare a modern later generation 737 with 2 x CFM / P & W 20,000-25,000 lbf,-
with this thirsty heavyweight museum piece from 1972 - using 3 x 20-23,000 lbf, you will find the A320 & 737 families empty are 10-15T lighter & use 1/3 less fuel.