Preventing Carbon Buildup in Direct Injection Engines

As direct injection engines become more common, they face the issue of carbon buildup on intake valves due to incomplete combustion, especially in short trips and with certain fuel types. While port injection can help clean valves naturally, direct injection engines lack this feature, leading to potential maintenance challenges. Drivers can mitigate buildup by using oil catch cans, avoiding short trips, running the engine at higher revs, and using fuel additives. Some automakers employ combined injection systems to balance power and cleanliness.