Canton pans are rated including 1 filter.With an 8 qt.,that would be 7 in the pan and 1 for the filter.
Don't count on the dipstick reading correctly.
Put 7 qts. in the pan and check,and remark if needed,the dipstick before starting.
Recheck the level after it has been started and
oil has drained back to the pan.Add more as needed to the new full mark.