Q: I have a 2009 VW with gasoline direct inject and a 2.0-liter turbo engine. It recently needed the intake valves cleaned (a very costly job) after just 54,000 miles. I understand many manufacture… ...

It involves modifying the engine to spray a small amount of fuel directly onto the valves to help keep them clean. It’s important to note that not all cars with direct injection experience long ...

Only air and blow-by goes past the intake valves in a direct-injected engine. There’s no repetitive pressurized squirting of gasoline over the DI engine’s intake valves to help keep them clean.

Consumer Reports even notes that it's BMW's recommended method for cleaning its direct-injection engines made between 2006 and 2016.

Gasoline direct injection, or GDI, is one of the most crucial bits of technology in the modern internal combustion engine.In engines equipped with GDI, highly pressurized gasoline is sprayed ...

Gasoline direct injection (DI) engines have been lurking in the shadows of gasoline-burning, internal combustion engine development for decades but are now becoming mainstream.

Q: I own a 2019 Subaru Forester. It has a direct injection engine. DI appears almost unavoidable now. I am very happy with my new Forester but am wondering whether there is anything I can do to ...

It was found that the inlet valves on GDI engines showed a tendency to accumulate a hard, ever-growing crust of carbon deposits around their neck.