CRC makes an intake valve cleaner for your GDI engine. GDI = gasoline direct injection. That means the gasoline is shot straight to the cylinders unlike your carburetor engines or your older throttle body injection where the gasoline actually washes over the intake valves, keeping them clean - which means the carbon doesn't allow it to build up on it - which means you have good compression. So what you need to do on your GDI engine is spray some CRC in it. This way you can clean the engine out. Better performance and you don't have to tear it down because of carbon build up.