According to page 6 of the manual
for the "3 cu. ft. Capacity Maytag® Centennial® Top Load Washer
" and page 8 of the manual
for the "Centennial® High-Efficiency Top Load Washer
", not more than 1 cup (250 ml)
should be used in either machine.
Also, it should be added to the dispenser cup on the front left of the machine - not directly to the wash as it will interfere with the detergents ability to clean the clothes.
I hope this helps & good luck. Please rate my reply. Thanks.