"Your engine has several strikes against it.
First off, it is a Direct Fuel Injection engine.
On top of that, it has a turbo installed on it.
The combination of these two items leads to raw fuel being forced past the piston rings, which then contaminates the engine oil, which lowers the Flash Point of the engine oil. When the engine oil gets hot, the oil turns into mist A LOT EASIER than fresh clean oil does, and gets sucked into the PCV system, and burned when it gets sucked into the combustion chamber, and further fouls up the compression and oil control rings with carbon. "
I’m not sure where you get this information about raw fuel leaking past the rings to dilute the oil. That is not a realistic drawback to direct injection engines unless, of course, an injector fails a starts constantly spraying fuel into the cylinder (which is also a problem with multi-point injection). It would be probably good to look at these websites to see some more information on direct injection systems:
canadiandriver.com
http://www.autos.ca/auto-tech/auto-tech-direct-fuel-injection-vs-port-fuel-injection
BTW, Diesel engines have used direct injection for over a decade without problems.