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Summary For direct-injection GM V8s, carbon buildup is a long-term maintenance issue, not a theoretical one. Oil vapor from the PCV system can coat the intake tract and valves over time, especially on engines that don't have fuel washing over the back of the intake valves. That is the core reason many owners start looking at an oil separator or oil catch can. This guide breaks down oil catch can maintenance cost, how much oil a catch can typicall...

Summary The 6.6L gas L8T in the GMC Sierra 2500 and 3500 is built to work, especially under load. That same workload also increases crankcase vapor, which means more oil mist moving back through the PCV system and into the intake tract. Over time, that can leave residue where you do not want it. A catch can is a simple way to intercept that vapor before it reaches the intake. This guide covers how the Sierra 2500 PCV system works, what the Sierra...

Modern engines meet emissions requirements by routing crankcase vapors back through the intake. Those vapors often carry oil mist, fuel residue, and condensation. Over time, that mix can leave an oily film in intake plumbing, coat throttle bodies and sensors, and contribute to intake-valve deposits on direct-injection platforms. A J&L Oil Separator adds a filtration step that keeps much of that contamination out of the intake stream. The valu...