I did a couple of things to hopefully slow down carbon deposits, especially on the backside of the intake valves.
1. Installed a Moroso catch can in series with the PCV valve. Mounted it up front for max airflow, but not interfering with the intercooler.
2. Installed another Moroso catch can in series on the L/S breather hose, on the opposite side of the other one.
These really work, especially in the winter time. I empty them both after every fill up. It's really amazing how much oil, water and fuel you catch with these cans. The PCV side catches the most, with the breather side catching smaller amounts.
It wasn't the cheapest way to go, but has been effective. The Moroso universal catch cans were $125 each and the hoses, fittings and clamps were close to another $80. I also bought the factory PCV hose and fittings, along with the breather hose and fittings so if I had to I could just swap them out.
With really no way to keep the intake deposits from the PCV system off the intake valves, It really does the job.
I also switched from Motorcraft 5w30 Full synthetic to 0w40 Mobil 1. I don't really think that this has really anything to do with intake deposits, but it will be interesting to see the Blackstone report differences between the two.