Motor oil generally contains a cleaning decomposition agent

Can remove the film and black carbon deposits attached to the piston

Wash down and disperse in oil

Reduce the generation of high-temperature deposits in the engine

So

Engine oil tends to turn black after being used for a period of time

But this does not mean that the oil has completely deteriorated

SO, you don’t necessarily need to change the oil if it gets dark~

Too much engine oil can easily form carbon deposits during combustion

A large amount of carbon deposits can cause a series of engine failures

Too much oil

It will also reduce the output power of the engine

It will also increase fuel consumption to a certain extent

Therefore

The more engine oil you add, the better

Should be controlled between the upper and lower scale lines of the ruler

Can be checked frequently and supplemented in time

Each brand’s oil additives are different

Mixing may cause deterioration of chemical components

Thus causing engine failure

It is generally not recommended to mix engine oils of different brands

In case of extreme circumstances

If you find that the engine oil is low on the highway

But the service station does not have your usual brand of engine oil

You can mix it first and replace it as soon as possible

After all, having oil is much better than having no oil

It is correct to check the engine oil frequently

But only replenishing without replacing can only make up for the shortage

Unable to fully compensate for loss of oil performance

Long-term pollution and oxidation will degrade its quality

Therefore, the engine oil should be changed regularly

Replacement cycle, varies depending on vehicle condition