[Occasionally6]

If you think about it, the engine downsizing occurs any time the DoD/AFM is active and the engine is operating on 4 cylinders i.e. as a 3.0l. The extra engine displacement available when operating on all 8 is in lieu of electric motor assist or supercharging.

I'm pretty sure, without reviewing the details of this system, that it is a mild hybrid, with the fuel saving (from the hybrid part) occurring with engine stop/start and KE recovery. The electric motor/generator doesn't contribute to moving the vehicle, just starting the engine and using recovered KE to run the engine accessories - such as the power steering pump - and power electrical loads with the engine off.

A USP was the ability to use the vehicle, idling, as an electrical generator in remote locations. There will be 110V power outlets in the cab and truck bed.

Aren't they pretty rare vehicles? I have recall of there only being a few thousand sold. If so, it would be nice to see a few preserved as an interesting part of auto history.