Ahhhh, I was not thinking that way. Probably because I ordered my current truck without that "feature". On my previous 2 trucks, I just deactivated it with Forscan. I guess the tuner would have done that as well, if I had not done it myself. It is an annoying feature. My wife still won't let me take it off of her Expedition Stealth.Cylinder Deactivation.
With an aftermarket exhaust it's very noticeable when flipping from V8 to V4.
To eliminate it, I'd change to tow/haul every time which deactivated C/D in the drive mode.