I've owned six Ford Powerstroke diesels. The old HEUI fuel systems use engine oil to operate the injectors. If you listen to that shrill Bill Hewitt from Powerstroke Help, you'll think Archoil could actually solve the North Korean missile problem or the China Trade deal. However, on HEUI engines like the 7.3L or 6.0L, perhaps it has some redeeming value reducing stiction or cleaning deposits. On a modern engine like the 6.7L Ford, it is snake oil. Another theory is that maybe additives and oil changes cause improvements to older, high-mile or high hour engines more than they would do on a newer engine.Well, maybe and maybe not. We both (Bulldog and I) run Ford V8 diesels, not gas motors though I still have a 7.3 PS and he's upgraded to a later model. I realized a 3 mpg increase in fuel consumption (and I penciled it carefully) when I started using Archoil Nano Borate additive and their fuel additive in my 7.3. Could be 'snake oil' but my calculations say no. Base oil remained the same, 5-40 T6. Is it cheap? No. Does it work? Certainly. Added benefit for me is the motor is a HUEI engine, Hydraulically actuated unit injector motor and the injectors tend to carbon up at the end of the injector pintle and the Nano-Borate cleans the carbon deposits away so the motor starts easier and runs smoother. It also keeps the motor clean inside (Nano-Borate is a cleaning compound). Last year I replaced the injector harnesses on both banks and had the valve covers off and both overheads were as clean and residue free as when the engine was built. If my Kubota tractors had the same injection system (they don't), I'd be using it in them as well.
Not sure about the sequential cylinder shut down feature being 'new'. My wife's 2008 Suburban LTZ has that. It has that to meet the fuel economy standards without having to pay a 'gas guzzler' tax. Runs on all 8 until you set the cruise (over 50) and then derates 4 cylinders and runs as a 4 cylinder until the ECM calls for 'power' and then it reverts back to all 8.
Cylinder deactivation isn't new...GM has had it since 2007 on the 5.3L engine. It is also responsible for thousands of 5.3L engines of the 2007-2013 vintage to consume excess oil. The current Dynamic Skip Fire is much more complex than the original 2007 engine, which could run on 4 or 8 cylinders. The new system can run on as few as one cylinders.