I previously owned a 2007 Dodge Charger R/T with the 5.7L hemi. The literature said that under certain light load conditions the engine went from 8 cyl to 4 cyl. I could never find any indicator that said it had happened. I think when I tried to accelerate the slight hesitation means the engine was going back to 8 cyl but that is only my guess.

I now own a 2016 Dodge Charger R/T also with the 5.7L Hemi. The literature again says thic cut back to 4 cyl occurs.

My question to the forum is: Is there anyway to know it has gone to the 4 cyl condition? I am curious that indeed it is happening. Comments welcom

 

You won’t know visually. Only by sound and power differences. It’s designed to be seamless.

 

I have a 2014 that has that. And there's a little green "ECO" light that comes on, on the instrument panel. I want to say it's in the row with the seatbelt warning.
But, there's a setting to turn it off in the infotainment system. I turned mine off so it doesn't come on.
Mine was on by default, I would think yours would have been too.

 

My sons 2016 does not have any indication when it happens.

 

Thanks guys for the info. The post on the 2014 got me to thinking so I dug the 2016 manual back out. I also downloaded a 2014 manual and read about the ECO light. I looked in the same section (fuel economy) in the 2016 manual and found a cryptic message about something changing color when the 4 cyl kicked in. This morning I was driving around town and turned the fuel economy window on the instrument cluster display. I was quite surprised to find that at times the circle in the center of that mileage gauge had a circle that was either blank or green with the words "4 cyl" depending on throttle conditions. I had the screen also showing instantaneous MPG. I don't know if that is essential or not. However, this answered my basic question and I now do have a way to tell if it is on.
Ted