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 manufacturers ...

Carbon buildup can create some big issues while you're driving. A few engine parts are more susceptible to it than others, so ...

Honda will introduce newly developed “clean” direct injection petrol engines for 2003 models in Japan. The new engines will have 20 percent better fuel economy and ultra-clean emissions about half the ...

Yes. Because the fuel/air mix is directly injected, it does not enter the combustion chamber via the inlet valves and does not clean them. As a result, carbon can accumulate on the inlet valves.

GM Powertrain announced today it will deliver a 3.6-liter V-6 gasoline engine with direct injection and variable valve timing (VVT) technologies in the 2008 model year. A vehicle application will be ...