03/04/2026
Based on the provided infographic, car exhaust smoke colors act as diagnostic indicators for specific engine issues:
Black Smoke: Indicates a "rich mixture" (excess fuel), usually caused by malfunctioning sensors.
Blue Smoke: A sign that the engine is burning oil, which typically points to worn piston rings.
White Smoke: Reveals a coolant leak, most commonly resulting from a damaged head gasket.
Gray Smoke: Often caused by a clogged PCV valve.
Monitoring these exhaust colors is a quick way to identify which internal components might need repair.
