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, ...

Add Yahoo as a preferred source to see more of our stories on Google. Consumer Reports has no financial relationship with advertisers on this site. The process of walnut blasting, which entails ...

Modern engines are cleaner and more efficient than the ones you grew up with, yet many drivers are discovering a new headache: stubborn carbon crust building up on intake valves. Understanding why ...

Port fuel injection has some big advantages, but automakers increasingly are using gasoline direct injection instead. The reasons are numerous.

Direct injection. Just about every car has it now, and those that don’t probably will in the next few years. It can add power, reduce emissions, and is a big part of why just about everybody is ...

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. This is all good, as DI ...

As we entered into 2014, the industry was abuzz with the acronym “GDI,” otherwise known as Gasoline Direct Injection. The “gasoline” distinction is significant because direct injection has existed in ...