Can Changan 35 car use 5w40 engine oil at minus 20 degrees in winter?

Yes, no problem, 10W is fine.

In the end, can 20w50 engine oil be used in winter, in fact, this problem is quite good, because 20w50 engine oil itself is a common type in all seasons, that is, it is not a problem to use this type of engine oil in winter. However, it still has to be decided according to the local climate change, after all, there is a critical value for the applicable temperature of each model.

According to the United States SAE regulations, the minimum temperature adapted to 20W50 is minus 10 degrees, if it is lower than minus 10 degrees, the oil will lose its due effect, and it is easy to have serious engine wear in the long run, and the cost of maintenance is not low. Therefore, before purchasing, you must pay attention to the local temperature changes, if it is in a southern area like Guangzhou, the temperature will definitely not be lower than minus 10 degrees in winter, so you can use it with confidence. However, if it is in a cold winter place like the north, you need to change the engine oil with more cold resistance.

Cold Tolerance Critical Value:

0w minus 50 degrees.

5W minus 40 degrees.

10w minus 30 degrees.

15W minus 20 degrees.

20w minus 10 degrees.

25W minus 5 degrees.

2. Is it better to have thin or thick oil?

3. What kind of car is semi-synthetic engine oil suitable for?

5W-30 and 5W-40 are two different oil viscosity grades, the viscosity of these two oil is not better than the other, in the case of using the same grade of base oil, 5W-30 and 5W-40 are the same in quality, but the parameter values of the oil are different.

The first 5W represents the low temperature fluidity of the oil, and the smaller the number in front of the W, the better the low temperature fluidity. 5W means that this oil can cope with temperatures above -30 degrees.

The latter 30 and 40 represent the high temperature kinematic viscosity, the kinematic viscosity of 30 oil is between 10-12, and the kinematic viscosity of 40 is between 13-16, that is to say, 40 oil is more viscous than 30 oil.

The difference between 5w-40 and 5w-30 is only the difference between the following numbers, 40 can be used in summer temperatures below 40 degrees, and 30 can be used in temperatures below 30 degrees.

In winter, low-viscosity oils with good fluidity at low temperatures should be used. The gradual use of engine oils has become an international consensus that the viscosity of engine oils will become lower and lower. In the early days, German cars usually used a viscosity of 40.

Now, 30 viscosity is recommended for German cars, while 20 viscosity oil is usually used for Japanese cars. The main reason for using low viscosity is to reduce engine cold cranking wear and fuel consumption.

The number of the oil.

It is usually a single-digit number plus w, followed by a ten-digit number, such as 5w-30 or 5w-40. What exactly does this mark represent and how to choose, many car owners are not very clear.

Let's start with the number before w. W stands for winter, and this number represents the frost protection index. How to look at it specifically, it is this number minus 35, which represents how many degrees of temperature the engine oil can ensure the normal start of the vehicle at a temperature of minus zero.

5W, that is, minus 30 degrees, the vehicle can start normally. At this level, in winter, the applicable ambient temperature of 5W-30 and 5W-40 is the same, and there is not much difference. If the vehicle is located in an area that is not extremely cold, it can be used.

You see this statement is wrong, the front refers to the low temperature starting temperature, 5 is about minus 30, the back refers to the viscosity of the oil, your car has been seven or eight years, the number of kilometers should not be low, it is recommended to use 40 viscosity, because the engine has been worn for a long time, the gap between internal parts will increase, with viscosity oil, the oil film is thick, can better play a role in lubrication.

Use 5w-40

I personally think 40's. You can also ask your local 4S shop.

Summary. Hello. If you are in a colder area in the north, such as the northeast, you can use 5w40 engine oil, and 30 in a warmer area.

Should you use 5w 30 or 5 40 for car winter engine oilHello. If you are in a colder area in the north, such as the northeast, you can use 5w40 engine oil, and 30 in a warmer area.

Ok thanks.

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Synthetic motor oil is semi-synthetic or mineral oil.

The best is a fully synthetic motor oil.

Is it okay for Geely Emgrand to use this?

Yes, no problem.

Yes, no problem.

I drive less car, once a year maintenance, sometimes twice, if the maintenance of the oil once a year will there be oxidation and other problems.

Fully synthetic engine oil is best serviced once every 8-10 months.

Don't take too long.

I changed this reason if there is a problem with maintenance once a year.

Yes, no problem.