My next procedure:
1) Drain 5 quarts
2) Pour 5 quarts
If it has a drain plug, make sure it i at the right level, then measure what drains out and add the same.
If it has an internal filter, it needs to be changed at some point (sometime before 60,000 miles IMO). Adjust fluid volume accordingly.
If no drain plug, drop pan, change filter, then add a drain plug so you can just do drain and fills from then on.
My F150 gets a 4 qt drain and fill every 10,000 miles, filter will be changed every 50,000 miles.
Scion xB had first drain and filter change @ 30,000 miles, drain and filter change @ 50,000 miles, and another drain and fill every 20,000 miles after that.
My Santa Fe will have a drain and fill @ 30,000 miles. Don't remember if it has a filter (don't think it does, but if it does, will be changed @ 50,000 miles).
Kia Soul will have a drain and fill @ 30,000 miles, and every 20,000 after (no filter).
Never have trusted any flush machine.