I do not have it marked on my maint. spreadsheet, but I am pretty sure I dumped in a container of Auto-Rx thousands of miles before the oil change.
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2001 Jeep Grand Cherokee Laredo 4.0- sold
1999 Dodge Ram 2500 w/Cummins- 4-sale