Direct Injection cars are very venerable to "Carbon Build Up" on the intake valves.
Most of this carbon comes from the PCV System. Without port fuel injectors to clean off the valves, the oil from the PCV system sits on the valve and burns, leaving behind carbon.
This can reduce both performance and economy.
The easiest way to prevent this is an Oil Catch Can System.
Ours is very effective! It take the oil vapor from BOTH PCV ports and cleans it before it returns to the intake.
By doing this you both maintain negative crank case pressure (which helps with the economy and performance of the car) and helps avoid that nasty carbon build up!
Installs in MINUTES with basic hand tools!
Our cans utilize stainless steel filter material, and specialized "emergency vacuum holes" that allow the crank case to breathe even if the fluid in the can freezes. This is a common issue for vehicles in cold climates.