Why is the Roewe i5 engine so loud?

There is carbon deposition: because the old engine oil is getting thinner and thinner, carbon deposition is increasing. When the engine oil is thin, it is easy to run the engine oil, resulting in more and more carbon deposits and loss of a lot of power. When replacing the new oil, the engine can't adapt to the viscosity of the oil, which may increase the speed and cause engine noise.

Different grades of engine oil have different characteristics, and their low-temperature startability, high-temperature wear resistance and adhesion also have different performances. The viscosity of engine oil is inversely proportional to temperature. When the engine is cold, the viscosity of engine oil is very high. If the selected oil is thick, it will add extra loss to the starting motor and battery. However, if the oil is too thin, it is difficult to form enough protective film at high temperature, resulting in insufficient lubrication and increased parts wear.

Extended data:

Precautions:

Clean the fuel system and air intake system regularly: if the fuel system is not clean, it will cause a series of faults such as unsmooth or even blocked oil circuit, lax valve closure, poor atomization of fuel injection, insufficient oil supply and low oil supply pressure, which will directly affect the normal operation of the engine.

In this regard, special cleaning agents should be used to clean the dirt and fuel gum in the fuel system. Due to the influence of service conditions, dust in the air will block the air filter or cause poor air intake.

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