2016 Dodge Charger R/T Scat Pack Highway MPG Test.
 

Hypermile a HEMI? Someone had to do it …

https://www.youtube.com/watch?v=Lyt1mX9t-PQ

I'd like to see a 2500 series diesel pickup. Some people's mileage claims are hard to swallow and the EPA doesn't require the normal fuel economy testing on them. I would suspect real world in you test to be about 20 MPG maybe 22 but I see guys talking 22 pulling a 5th wheel camper at 80 mph type garbage. A few Chevy guys are convinced they get better mpg at 80 mph then they do at 60, again hard to swallow.
One thing to factor in would be a regen cycle. Some people say that will take their 18 mpg tank they were working on down to 14 mpg in just a few minutes.
Honestly I expected a little better from the Dodge. I wonder if a manual would have been better.

I just filled my 3500 4X4 last night after a trip over and back across Chinook Pass.
No coasting, driving 60~65 max. I got 22.1
That was an empty truck on M&S tires, no aero. It is consistent with what I got since the gear change.
With my 8500 pound 5th wheel gets 12 over the same route, maybe 12. something. I get 13 only on flatter routes.

I believe it on the older Dodges. I don't so much on the 2009 up trucks unless they have had the emissions removed.

My older dodges can get as much as 13 at 75 mph with an 8k lbs travel trailer. Eco modding has just begun. The 5 sp gets consistently 2mpg better than the auto with same conditions. Next time out, I'm going to try to keep it down to 60 and see what happens. The hardest mod for me to make is adjusting the nut behind the wheel.