And didn’t I say
“Tester, a 100% exchange only occurs when it is done as you describe”
I was trying to point out that you were right when done your way, George was right when the pan is not dropped or drained.
missileman is also correct as long as the ATF is changed on a regular basis, 30-40k or so. If you don’t follow the schedule and the ATF has turned brown (or worse), then an exchange machine (properly done with a pan drop or drain) or four back to back changes are in order.