What does blue smoke from a vehicle's exhaust generally indicate?

Blue smoke from a vehicle's exhaust is a clear indication that the engine is burning oil. This typically occurs when engine oil enters the combustion chamber and is burned along with the fuel. Several issues can lead to this problem, such as worn piston rings, damaged valve seals, or other internal engine faults that allow oil to seep into areas where it shouldn't be.

Recognizing blue smoke is crucial for vehicle maintenance, as prolonged burning of oil can lead to more serious engine damage if not addressed promptly. The distinct blue color is a helpful visual cue for drivers to take their vehicle for inspection. Thus, when a driver sees blue smoke, it's essential to take action to prevent further engine complications and maintain the vehicle's health.