Black smoke from the exhaust is a sign that the engine is burning too rich a mixture of fuel and air. A rich mixture is a mixture that contains less air than is necessary for the complete combustion of the fuel.

This means that a larger amount of fuel enters the cylinders than would belong to a certain ratio of air, due to which incomplete combustion occurs. This incomplete combustion results in black smoke from the exhaust, which contains a large amount of soot.

Blue smoke from the exhaust means only one thing: engine oil enters the cylinder space. The more engine oil penetrates into the cylinders, the more the car smokes.

In addition to the blue smoke from the exhaust, an accompanying phenomenon of oil penetration into the cylinders is also excessiveengine oil consumption.

In the era of two-stroke engines, smoke from the exhaust was nothing special. Almost every single car smoked. Nowadays, modern cars practically don't smoke, but when they start, it means trouble. Smoke from the exhaust can alert you of a possible problem or engine failure, and color plays a crucial role in diagnosis - it tells you what kind of malfunction it is.

That's why we prepared an article in which you will learn what the exact color of the smoke means. This will help you to at least approximately determine where the malfunction occurred and what you should check or repair.