I knew it was one of you F guys

Sorry, I owe you a Banana.
I always liked "overpowered" Trucks... (I still wished I'd never sold my old '78 440 RamCharger) Seems you always found a use for them. I'm looking for a new truck now for a new job where I'll be commuting some 100 miles a day....And I've found myself trying to be sensible and get a big 4 cyl with a stick.
I've heard the new Ones (I think Chevy ?) were going back to the 4-6-8 cyl thing they did with Cadillacs back in the last gas crunch where they only run on 4 when your cruising but use all 8 when you start. Supposed to be highly improved from the old Caddy's.
Anyone own one or are thinking of it? Heard anything yet? How's the Mileage?