Originally Posted by Mrfix

You're not wasting your money. Even though you only have direct injection the fuel cleaner will help keep your pistons and cylinders clean. A $10 can of Seafoam once a month is hardly wasting your money. If you wait for symptoms to show up then it will be too late for anything but a rebuild.

So if your inclined to try to prevent a problem in the future run the Seafoam through and also follow the directions in the video I posted. When you spray the Seafoam into the intake manifold it cleans your valves that otherwise don't get clean in the normal operation of your vehicle. That's why I posted it. Running it through your intake like in the video is probably the most important thing you can do to avoid the problem.

And fix your PCV system because that is the primary cause of why the carbon issue occurs.

If you can't do that because you don't feel confident then find someone who can do it for you. Or just accept the fact that you might eventually have to spend 3-5 k to fix your car.