Oil skips over dirt and all other contaminants on engine internal parts same for transmissions. Oil can't lubricate through dirt etc, it is the major reason that metal wear becomes an issue requiring new parts etc.
Auto-Rx can't fix metal wear however it can change the effects of wear by giving any oil a clean surface to lubricate.
The results are simply amazing when every nook and cranny inside an oil lubricated engine or transmission is now getting the benefits of total lubrication