Just because there is black ash in the exhaust pipe of Pacific Auto Network doesn't mean it is burning engine oil. It is normal to have black ash in the exhaust pipe, because the engine of the car can't burn gasoline completely, and unburned impurities will be discharged from the exhaust pipe and finally attached to the exhaust pipe. Especially in the initial stage of cold car, it is easy to happen? Insufficient combustion? Or there is something wrong with the engine oil, which leads to insufficient combustion, so that the exhaust pipe will emit black smoke and turn into black ash over time.

The exhaust pipe of the direct injection engine in the cylinder will turn black quickly, even if it is a new car, because the direct injection engine directly injects gasoline into the cylinder through the nozzle instead of supplying oil with steam.

After the direct injection technology is adopted, the fuel enters the cylinder in the form of fine droplets. Due to the special structure of direct injection engine, there is carbon deposit on the back of intake valve. Self-cleaning? The ability is much weaker than that of ordinary EFI engine, so although the direct injection engine saves fuel, the problem of carbon deposition is also very annoying.

It is normal for the exhaust pipe to turn black, as long as the engine has no serious carbon deposition, oil combustion and oil problems.

(Photo/Text/Photo: Pacific Auto Network Car Selection Brother)