I’ve got a 2021 RAM EcoDiesel Built to Serve, Coast Guard edition. Gets an honest 26.5 mpg city and 29.5 mpg freeway at 80mph. It’s got a 33 gallon tank and can drive all day. It’s one of the most comfy rides I’ve ever had, and I’ve had some expensive cars.
30 @ 80 sounds good to me.
I test drove one of those a few years back while I was in Denver [5000 ft. plus as I was over by Golden]. It seemed to move about just fine. I was unable to get any real world F.E., so have wondered about that since. Thanks for sharing.