There is noise in the engine. Is it the oil? What kind of oil should I change for oil change?

Improper use of engine oil model, especially when the viscosity is too low: the used engine oil is lower than the specified viscosity. It is easy to cause engine noise, increased jitter and decreased power. So be sure to use the engine oil of the model that matches the vehicle. A dirty intake system can also increase engine noise. After the air filter element, throttle valve and throttle valve are dirty, the air intake becomes smaller or abnormal, which affects the normal operation of the engine and increases the noise of the engine. Therefore, it is recommended to replace the air filter element normally and clean the throttle valve irregularly. The main reason is nozzle blockage. Generally, if the nozzle is not cleaned for a long time, there will be some carbon around it, which will affect the atomization of gasoline and lead to poor oil-gas mixing. Combustion efficiency is poor and abnormal noise increases.

Ignition system, if the spark plug and ignition coil fail, the engine will shake, the noise will increase and the cylinder will be seriously missing. Generally, few cars are in good condition. The exhaust system, the exhaust system is generally fine, and the problem may also be the engine's problem. The engine burns badly, resulting in carbon deposition and slow three-way blockage. Data deviation of oxygen sensor. Engine jitter, noise and fuel consumption will all increase. SAE grade mark of lubricating oil viscosity, SAE is American Society of Automotive Engineers in English, for example: SAE 15W-40, SAE5W-40, "W" means that the smaller the value before winter, the better the low-temperature fluidity of engine oil, and the lower the ambient temperature, the better the ability to protect the engine during cold start; The number after "W" (one horizontal) is the index of high temperature resistance of engine oil. The higher the value, the better the protective performance of oil at high temperature.

Because the working speed of the turbocharger is too high, any ball bearing can't bear the strength of 10000 rpm, so the spindle is not a ball bearing and turbine body, but a floating design. The main shaft floats in oil, and the very narrow space between the turbine body and the main shaft is filled with flowing oil, which plays a role in lubrication, can take away local impurities of the main shaft and the turbine, and plays a role in heat dissipation. Synthetic engine oil is relatively sparse, with good lubrication and heat dissipation. After the turbine speed is increased, this thinner engine oil can flow to the lubrication part at 100%, so the above problems will not be too many.

High-end cars usually use all of synthetic engine oil, and even many supercars use 0W-50 series supercar oil with excellent fluidity. If the oil has good fluidity, it means that the viscosity is thin. I said a lot of benefits earlier. Another disadvantage is that the proportion of oil flowing from the cylinder and piston ring into the combustion chamber is larger, so the fuel consumption is naturally much higher than that of those family cars. Unless high-grade engine oil is not used, it is inevitable that high-grade cars will burn more or less engine oil. But if you consume more than half a liter of engine oil every 2000 kilometers, it is also a problem, not normal consumption.