If the engine of your BMW has any problem, it will produce some unusual noises with different colors of smoke from the engine. Moreover, the smoke produced from the engine is a serious concern that needs the immediate attention of a mechanic. By analyzing the color or smell of the smoke you can easily determine the exact problems in the car. The following slides define the reasons behind the smoke produced from the engine of your BMW.
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What Causes Your BMW Engine To Smoke A Lot in Mountain View-5 Common Reasons
20. If the engine is burning
oil excessively, it will
produce blue or gray
smoke with a bitter odor.
21. Due to other reasons,
you will notice the blue
or gray smoke produced
from the engine such as:
Worn piston rings
Leaking valve seals
The wrong type of oil
Overfilled crankcase