1 Is it better to use 5W40 or 5W30 for 4T engine oil

Which engine oil to use should be based on the situation of your car, and the right one is the best.

W40 has better oil stability than 5W30 in particularly high engine temperatures.

3. For old cars, the engine noise of 5w30 oil is slightly louder than that of 5w40 oil.

4. Engine oil of the same quality level: 5w30 has better fluidity than 5w40, which can reduce fuel consumption (fuel) and dissipate heat faster for the engine.

How to choose the right oil.

1. Look at the car system. Generally, Japanese and Korean cars are recommended to use viscous oils, such as: SAE 0W W30; The U.S. recommends using 30 viscosity oils, such as SAE 5W30, and European products recommend using 40 viscosity oils, such as 0w W40.

2. Look at the temperature. Within the reasonable range specified in the manufacturer's driving manual, it is more recommended to have better fluidity in winter and more viscous oil in summer.

3. Look at the age of the car. On the basis of referring to the car maintenance manual, the new car chooses a slightly lower viscosity oil, at this time 5w30 will be more suitable, with the increase of the age of the car to choose a slightly larger viscosity oil, the car engine wear will be more serious, so it will be necessary to choose a relatively high viscosity oil, in the process of driving will be more comfortable and smooth, at this time 5w40 will be more suitable.

4. Look at the road conditions. Road conditions will greatly affect the life of the oil, and in areas with poor road conditions, the oil change interval should be shortened. In urban areas, due to frequent traffic jams, resulting in frequent pauses during driving, it is recommended that the viscosity is lower, and the oil such as SN 5W30 is very suitable; If you often drive long distances and run high speeds, it is still recommended that you choose SN 5W40.

There is a misunderstanding about what kind of engine oil to use, the most important thing is to see how much viscosity oil the vehicle engine is suitable for, not just to say that 30 is good or 40 is good. The 4t engine is suitable for oils with viscosities between 12-13.

I used 0w40 for 2 guarantees, which is the so-called "high-end fully synthetic engine oil" 470, the engine oil is something that has been used for a long time, and it is okay to change it once in 10,000.

Use 5w-30, because it is thinner, suitable for sudden changes in speed, but 5w-40 is thicker, suitable for driving tens of thousands of kilometers after the car.

The gap is not big, the former is better, this is a viscosity and flow indicator, not a level level, not a level.

The main difference between 5w30 and 5w40 is viscosity, 5w30 viscosity is low, there are more traffic jams in Beijing, 30 viscosity oil will start faster than 40 viscosity, the power response is more obvious, if it is winter, the cold start will be better than 40.

Of course, it is not 40 bad, it is more suitable for 30 in the case of traffic jams in Beijing, if it is often high-speed and intense driving a lot or 40 viscosity is more secure, because the viscosity is higher, the engine is better at high speed and high temperature.

In addition, it still depends on what kind of car it is, if it is a European car and the displacement is above the displacement, do not consider the 5w30 oil.

Of course, 5w30 engine oil with a high temperature shear value above and a kinematic viscosity of 100 or more is above 12 is barely possible, but 5w40 is still recommended.

The vast majority of car owners will use engine oil during car maintenance, 5w-30 and 5w-40, the difference of 10 indices of the two car oil will always make it difficult for car owners to choose: which oil is of better quality and more suitable for their car? So how do you know which model to choose for your car?

Clause. First, look at the car series.

American cars, the engine is more precise, the gap between parts is smaller, and the oil of 5w-30 is the most suitable. As for German cars, turbocharging technology is usually used, and the gap will be relatively large, and it will be relatively better to choose 5W-40. Japanese and Korean cars will use more viscous oils, such as:

sae 0w
w
w
w-30；The American system recommends using 30 viscosity, such as: SAE 5W-30, and the European system uses 40 viscosity, such as: 0W W-40.

Clause. Second, look at the age of the car.

By referring to the maintenance manual on the car, new cars usually choose oil with slightly lower viscosity, then add 5w-30, and Japanese and Korean cars can use 0w20. As the car ages, slowly choose a slightly more viscous engine oil, because the wear of the older car engine will be more serious, choose a relatively higher viscosity of the Riseau engine oil 5W-40.

Clause. 3. Look at the road conditions.

At the same time, the road conditions will also greatly affect the life of the oil, poor road conditions in the area, should be quite short the oil change cycle, and in the urban area due to more vehicles, often stop and go, it is recommended that the viscosity is a little lower, SN5W-30 will be very suitable, if you often run long distances and the like, it is recommended to SN5W-40.

Clause. Fourth, look at the season.

The main differences between 5w30 and 5w40 are:

The 5W-30 flows relatively well and is more capable of reducing fuel consumption problems, allowing the engine to dissipate heat faster and better. At the same time, for some older cars, the use of 5W-30 will cause the engine noise to be slightly larger, and some strictly require the use of 5W-40 engines and choose to use 5W-30 will cause greater fuel consumption than normal. At high temperatures, 5W-40 will have better oil stability.

Generally speaking, 5w40 is better. In general, 5w40 oil** is also a little more expensive. The number plus sign in front represents the oil sign in winter, the smaller the number before the w, the smaller the low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature, and the later the number represents the summer oil card, the larger the number, the greater its viscosity, and the higher the applicable maximum temperature.

The difference between engine oil 5w30 and 5w40

1. If the car is in good condition, the viscosity of the oil must refer to the recommended viscosity in the "Car Maintenance Manual", because the technical requirements of the engine designed by each automobile manufacturer are different, and the requirements for the viscosity of the oil are also different.

W40 has better oil stability than 5W30 in particularly high engine temperatures.

3. For cars in old condition, the engine noise of using 5w-30 oil is slightly louder than that of 5w-40 oil.

4. Engine oil of the same quality level: 5W-30 has better fluidity than 5W-40, which can reduce fuel consumption (fuel) and dissipate heat faster to the engine, and the fluidity of low-viscosity oil is better than that of high-viscosity oil.

5. For engines that strictly require the use of 5W-40, if 5W-30 is used, there may be a situation where the oil consumption is greater than normal.

To put it simply, 5w40 is thicker than 5w30 oil, the longer the car is used, the higher the number of kilometers, then the oil you choose has to choose the oil with the larger number behind w, because the parts in the engine are also worn out, and the gap becomes larger If you use dilute oil, it will burn the oil, depending on the engine model. It doesn't say which one is good and which one is bad, depending on which one your car fits into.

In the oil label, the smaller the number before W, the more resistant to low temperatures; To put it simply, the smaller the number before W, the better the fluidity at low temperature, and whether the fluidity at low temperature is good or not is related to whether the car is smooth when starting; For example, in the extremely cold areas of the Great Northeast, it is common to have a sub-zero degree in winter, and at this time, it is necessary to use 0w-xx engine oil with better low-temperature fluidity.

530 and 540 have semi-synthetic and fully synthetic types, if you compare, it must be semi-synthetic and semi-synthetic contrast, full synthetic and fully synthetic contrast, as for whether it is synthesized or not, there is not much mystery in it, semi-synthetic base oil is refined mineral oil, ** cheap, pure fully synthetic base oil is synthetic ester, ** more expensive.

The better the fluidity at low temperatures. The higher the number after w, the higher the viscosity and the better the protection performance against high temperatures. For example, it is also 5W, but the number 40 after W is larger than 30, indicating that its viscosity is higher than 30.

Knowing this data can help us to choose the exact oil we use.

On the basis of single-grade viscosity, the oil with compound viscosity is added with the index of low temperature start-up to meet the needs of the winter ambient temperature in different places, which are 0w, 5w, 10w, 15w, 20w, and 25w, respectively, corresponding to the lowest starting temperature below zero, which is -35, -30, -25, -20, -15, and -10 degrees. Then it is necessary to combine the actual situation: if you are in Hainan and drive to Mohe, the viscosity and temperature of the engine oil should be changed; Or you usually add 30, and you may have to change the viscosity when you go off the track.

W stands for the meaning of winter, and the number in front of W represents the fluidity of the oil at low temperatures. The value after w indicates the viscosity of the oil at 100°, and the higher the number after it, the better the viscosity of the oil at high temperature. I feel that the No. 95 car has better power and is more resistant to driving, and I always feel that the higher the grade of the engine oil, the better, and the actual situation is the best if it is suitable, and only by understanding the principle can we truly understand.

It should be 5w30 is better, because the oil of this engine is very good, and the quality is also very good, ** is also very favorable, and the cost performance is also very high.

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

For these two types of engine oil, it depends on what engine is used to determine whether it is good or not. If you talk about these two types of engine oil separately, as long as it is a fully synthetic engine oil, this one is better. 5W-40 engine oil for this German car engine kilometers are relatively large, the use of this oil is relatively high, suitable for this engine kilometers of large kilometers, practical.

This oil of 5W-30 is suitable for German engines with relatively small kilometers, or Japanese engines or American engines.

Of course, 5w40 is better, but the ** of this oil will be more expensive and can adapt to the current weather.

5w40 is a little better. This is very good in the winter, and it still has a certain amount of mobility.

If it is an old car, 5w40 is better, because it has a better viscosity than 5w30. If it's a new car orNaturally aspirated engine5w30 is better, because it can effectively reduce fuel consumption, make the engine faster and better heat dissipation. If you drive long distances, 5w40 is better.

The symbol w stands for Winter (winter). The smaller the number before w, the smaller the low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature. The main identification of engine oil is:

0W, 5W, 10W, 15W, 20W, can be used at -35°C or more, 5 means can be used at -30°C or more, and so on, 25 means can be used at -10°C or more.

Notes:

The oil classification is indicated using a two-letter combination. The series starting with "S" stands for gasoline engines.

With oil, the general specifications are from SA to SN (in alphabetical order, but there is no SI in it), and with each additional letter, the performance of the oil will be better than the previous one, and there will be more additives in the oil to protect the engine;

The lower the letter, the higher the quality grade, and most of the oil grades in international brands are above the SF grade. The series starting with "C" stands for diesel engines.

with oil. If the letters "S" and "C" are present at the same time, it means that the oil is a general purpose type of gasoline and diesel.

The above content reference: Encyclopedia - Engine Oil.

Whenever possible, a less viscous oil should be used to keep the oil path clear. For example, in the high temperature season or under the condition of severe engine wear, the selection of high viscosity oil is conducive to the formation of oil film and reduces engine wear. Engine repair agent is a car maintenance product that repairs the most motivated problem in the field.

Oil consumption is not severe enough to survive the cycle between maintenances, but in the summer due to the hot weather, oil consumption will be a little higher than usual. If it is found that there are impurities or gasoline smell in the engine oil during the daily inspection, and the exhaust smoke is light blue, it means that there is a problem with the engine, and the parts may be abnormally worn, so you should enter the factory for maintenance as soon as possible.

1.Engine oil, that is, engine lubricating oil, can play a role in lubrication and wear reduction, auxiliary cooling and cooling, sealing and leakage prevention, distribution anti-rust and anti-corrosion, shock absorption and buffering and so on. It is known as the "blood" of automobiles.

2.Engine oil is made up of two parts: base oil and additives. Base oil is the main component of lubricating oil, which determines the basic properties of lubricating oil, and additives can make up for and improve the shortcomings of base oil performance, give some new properties, and are an important part of lubricating oil.

3.The 5W W-30 and so on in the engine oil indicate the viscosity grade of the engine oil, which is the SAE grade. "W" means winter.

The smaller the number in front of w, the smaller its low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature. The number after w does refer to the viscosity of the oil at 100 degrees Celsius, and the higher the number, the more viscous the oil. The number behind the spine mainly refers to the index of the high temperature resistance of the engine oil, and the better the protection performance at high temperatures.

4.There are the following brands to choose from, Shell, Castrol, etc.