Carbon buildup on intake valves is part of life for direct-injected engines, but there are things you can do to slow it down.

Before the turn of the millennium, you wouldn't find many people complaining about carbon deposits on engine valves. However, all of that changed as gasoline direct injection (GDi) went mainstream in ...

Carbon deposits are a normal occurrence in an engine, but can build up over time, causing problems. Essentially, heat, pressure, and oxidation can transform unburned fuel into a black soot-like ...

While carbon buildup happens on essentially all engines, gasoline, diesel, N/A, or boosted, it's an increased concern in GDI engines. Standard Electronic Fuel Injection features injectors higher in ...

If you have ever stared at a disassembled engine, you might have noticed that the cylinder heads looked like they were pulled out of a tar pit. Decades of baked-in oil varnish, carbon scaling, and ...