Valve gunk is nasty stuff that comes from the toxic vapor of steam, oil, gasoline and hydrocarbons circulating around the inside of your engine. A normal process of combustion in any gas powerplant, ...

A few simple checks and tips can help ensure maximum peace of mind when buying a used GDI-powered car. The Gasoline Direct Injection (GDI) engine is marketed under different names by different ...

Here’s part of our conversation about valve gunk, its effects on direct-injected engines, and whether there’s cause for concern. Apparently, proper maintenance and following manufacturer ...