If you have any ecoboost (ford turbo engines in Mercurys, Lincolns and Ford from the last 7 years),
install an oil catch can. Heck, if you have any GDI vehicle, strongly consider an oil catch can.
It's not "unbreakable" without one. I don't care what Mike Rowe says, returned oil doesn't get burned through the system and builds up. Unless you plan on cleaning above the head every 120k miles manually, it's going to gum up like crazy. Oil catch cans do just that, catch this unburnt oil(known as oil carry over or blow-by) so it's not a problem.
Pays for itself tenfold within the life of the vehicle. Seafoaming(aka: kerosene-oil blend) *might* clean some of it if you treat at the intake and not gas tank, no fuel injector cleaners (even if it has 100% PEA) work, BG44K is pretty volatile and works to clean at the expense of possibly weakening other parts down the line, no spraying special sauce into the chamber with some long straw, only manually removing the upper half (both sides of a v6) and basically doing a top half rebuild will clean it safely.
https://www.youtube.com/watch?v=v6h_FOzFMcs
He speaks the truth, and IIRC, moved to Ottawa IL to open his own shop in the last year or so.