Friends, is the dipstick a cold car or a hot car?

Of course, the engine oil should be seen when the car is hot, and there is no basis for the words, so let's take a look at why we should look at the amount of oil when the car is hot. During engine operation, the oil pump draws oil from the oil pan and sends it to each lubrication part, and the lubricated oil flows back to the oil pan again, and so on. Therefore, theoretically speaking, as long as the oil level is normal at this time, the oil pump can continue to pump oil for lubrication.

It's all when it's cold, don't start the car in the morning, take it out and look at it, this time is the most accurate.

When the car is hot, the oil is moving, and it has the effect of thermal expansion and contraction, so the amount of oil cannot be effectively seen. Therefore, look at the oil dipstick or look at it when the car is cold. Preferably after driving. After half an hour, it was the most accurate at that time.

The dipstick should be seen when the car is cool. This is because of thermal expansion and contraction, and when the car is hot, the internal temperature of the engine is very high, and the oil will expand accordingly. There is also a part of the engine oil that sticks to the respective job position instead of precipitating at the bottom of the oil casing, so the amount of oil in the engine at this time is about one-third less than in the case of a cool car.

Therefore, it is the correct way to detect the oil dipstick of the cool car.

It is seen when the car is hot, because when it is cold, the oil solidifies together, and it is more difficult to flow.

Look at the cold car. This is a skill that must be mastered by a person who owns a car.

The dipstick must be accurate when the car is cold, and people are usually used to check the oil level after leaving it overnight, and the next morning, it is more accurate to check the oil level in the cold car; Many car manuals require that the engine be turned off and left for 10 minutes before inspection, which is also intended to allow the vast majority of the oil to flow back into the oil pan! Therefore, there is not much difference in the amount of oil that can be reflowed back to the oil pan after a night of cold driving and 10 minutes of cold driving.

I think it should be more accurate to see when the car is cold, park the car on flat ground, turn off the engine, wait for more than an hour, almost all the oil attached to the surface of the parts in the engine flows back into the oil pan, and the oil dipstick at this time shows the standard oil filling amount of the engine. ‍‍

The displacement of the average family car is below and the oil filling volume is less than four liters. This amount has a lot of margin for the engine, which can meet the lubrication needs of the car in various road conditions and use conditions, such as when the car is driving on a very steep slope, when running at high speed, when accelerating or decelerating sharply, it still ensures that the oil pump can draw enough oil to lubricate the engine. In ordinary urban road conditions, half the amount of engine oil can meet the basic lubrication needs of the engine.

What is the error in checking the engine oil when the cold car is not started? At this time, all the oil is refluxed in the oil pan, if the oil level is checked at this time, when the engine is started, a part of the oil will be retained in the lubrication system channel, and the oil level will be lowered, so the amount of oil checked when the cold car is not started may be low.

The car's maintenance manual will indicate the amount of oil filled in the car, which refers to the total amount of oil in the engine. That is, all the oil in the engine is drained, including the oil in the oil filter and the lubricating oil channel, and then the oil is filled to the upper limit of the oil dipstick.

This is a difficult question because I don't know what this is, no car haha.

No car, look at a hammer.

The oil dipstick can be seen in a cold car or a hot car. Whether you are a cold car inspection or a hot car inspection, the premise of checking the oil quantity is the same, that is, the vehicle is required to check the oil level on the level ground, the owner will pull out the oil dipstick, and then wipe it clean with cotton silk, insert it into the body, and then pull out the oil dipstick, and see the position of the oil scale line on the top that is soaked in oil, you can know whether the oil volume of the engine is more or less.

A remedy for a large or small amount of oil.

If you find that the amount of oil is large, it is no longer recommended to start the vehicle by yourself, and it is not recommended to release the oil and pump the oil by yourself, waiting for rescue is the solution.

If the hot car inspection finds that the amount of oil is less, lower than the minimum line, it is recommended to wait for the engine to completely change to normal temperature, add a small amount of the same type of engine oil, add it to the normal range can be used, if the amount of oil burned exceeds the national standard, it is recommended to go to the service station as soon as possible to check the problem.

Look at the dipstick to cool the car.

The oil gauge is generally seen in a cold car, and there is also a situation in which a hot car is seen, that is, the oil is changed and it takes a few minutes to run. The purpose is to filter the oil out of the organic oil, so that it is enough to accurately shut down the engine and wait for about 10-15 minutes, so that the oil will all flow back to the oil pan and then check. If you need to check it often, you can check it before starting the vehicle in the morning, and the oil level is also accurate at this time.

Only when the car is in a cold state (10-30 minutes off) will the oil flow back into the engine oil pan. Once the car is warmed, part of the oil will flow to the inside of the engine, so when measuring the amount of oil when the car is hot, the dipstick scale will definitely be low.

Correct operation

Normally, as long as the tick mark is between the upper and lower limits, it is fine. If it is lower than the minimum scale line, although there is still oil left in the tank, we still have to go to the 4S shop as soon as possible or replenish the oil by ourselves. The difference between the oil dipstick of the cool car and the hot car can be said to be very large, almost 1 4 liquid levels.

If the measured oil level is 3 4 (between the upper and lower lines) in the cold car state, then the liquid level in the middle is in the hot car state.

Don't drive violently, because the engine is running at a high state, the temperature must rise a lot, and the amount of oil itself is not much at this time, it is easy to cause the engine to overheat the fault, and the engine may be scrapped directly.