I don't like some of the generalizations that guy made, but I get his point. I do plan on using an intake valve cleaning product. It can work as a preventative, but not a cure for a trashed engine
I always avoid lugging my little Ecoboost engine, and I will stick to a 5,000 mile OCI on full synthetic. The PCV system seems adequate to me. I'll see what happens.
2017 Ford Fiesta 1.0T - Valvoline SynPower 5W-20, Motorcraft FL910S
1988 GMC K1500 4.3/700R4 - Supertech 15W-40, Fram TG3980