The ecoboost motors are all nifty with all fords chips in them, hybrids be damned they say.
The most common problem is the carbon build up. Which is solved by using a low voc oil, such as the factory recommended oil or pennzoil platinum. Also using top tier gasoline is a must, absolutely no junk.
most of the problems could have been prevented if it wasn't for the damn EPA. mostly running an oil seperator in the pcv and breather lines would have kept any oil from building up due to blow by of a boosted motor.
Also don't run an oiled air filter as they allow to much junk in and the oil from the filter to enter the engine and get built up on the valves and because it's DI there is no fuel going over the valves. Also not to mention how lean they have to run to keep the EPA happy.
Ford is working with someone to get a turbo same induction cleaning than can be introduced through the manifold to actually go over the valves, apparently current induction cleaning chemicals over heat the turbos and make them glow red from the heat.
i have no qualms about buying a ecoboost, I run it through the gears once a week, only use top tier fuel and switched out to a low voc oil at 750 miles, and once the warranty is up I'll be installing an oil seperator. I also plan on using Techron every 3,000 miles I the gas tank to keep the injectors and HPFP clean. Also once tunes become available for the US software I'll be doing that to let it run a little richer and not so lean.