Some Chevrolet Cavalier owners report experiencing issues with greyish blue smoke emitting from the exhaust, which indicates that the engine may be burning oil. This type of smoke typically suggests that lubricant oil is being burned within the combustion chamber or leaking into the exhaust system. Possible causes include leaking valve seals, damaged piston rings, worn cylinder walls, or a malfunctioning turbocharger. It is essential for owners to address this problem promptly to prevent further engine damage. If blue or grey smoke is noticed, it is advisable to have a qualified technician inspect the vehicle to diagnose and resolve the issue, as ignoring it can lead to more severe engine problems.
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