Is it better to have a fully synthetic motor oil: 5w40 or 5w30?

The difference between fully synthetic motor oil 5w30 and 5w40 is: 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. And the higher the number after the w, the more viscous the oil.

The following numbers mainly refer to the index of high temperature resistance of the engine oil, and the higher the value, the better the protection performance of the engine oil at high temperatures.

Engine oil is like a person in the heart, whether the oil is selected well has a great impact on the life of a car, today I will teach you how to choose engine oil.

1.According to the age of the car: Generally speaking, 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 with a large age.

The wear will be more serious, so you will need to choose a relatively higher viscosity oil, which will be more comfortable and smooth during driving, and 5w40 will be even more at this time.

2.According to the road conditions: the road conditions will affect the life of the oil to a large extent, and the oil change interval should be shortened in areas with poor road conditions.

In urban areas, due to frequent traffic jams, resulting in frequent pauses during driving, it is recommended that the viscosity be lower, and if you often drive long distances and run at high speeds, it is recommended that the viscosity be slightly higher.

3.Depending on the temperature: due to summer and winter.

The temperature difference is relatively large, and the oil pressure gauge is generally low in summer, but as long as it is within the reasonable range specified in the manufacturer's driving manual, it is a normal phenomenon, and the majority of car owners do not need to panic excessively for this matter. If the oil pressure gauge is unusually high or low, deviates too much from normal or is not within a reasonable range, then it is necessary to check thoroughly to see if there is something wrong with the engine, such as a broken sensor, a blocked oil circuit, etc. Don't see that the oil pressure gauge is low, and try to choose a very high viscosity oil!

Car owners must jump out of the "need to change high-viscosity engine oil in summer, the greater the viscosity of the oil, the better."

You have to choose according to your car.

What's right is best.

Which is better engine oil 5w30 or 5w40? Many car owners use it incorrectly.

First of all, it is necessary to understand the difference between fully synthetic engine oil 5w30 and 5w40: take 5w-30 as an example, 5 means that the temperature applicable to the engine oil is above minus 25 degrees, and the smaller the value in front of w, the better the low-temperature fluidity. In other words, it is more suitable for northern winter, and has good cold start performance.

W means winter, and the applicable temperature range is relatively large, which means that the engine oil can be used in all seasons. The value after 5w-30 is the viscosity index, which means that the viscosity index of the oil is 30 in the working state of 100 degrees Celsius, the higher the number, the higher the viscosity, the better the protection of the engine at high temperatures.

The main difference between 5W30 and 5W40 is that 5W-30 has relatively better fluidity and is more capable of reducing fuel consumption and making the engine dissipate heat faster and better. At high temperatures, 5W-40 will have better oil stability.

Secondly, the same quality class of engine oil W-30 has better fluidity than 5W-40, which can reduce fuel consumption (fuel) and dissipate heat to the engine faster. (Low viscosity oils flow better than high viscosity oils).

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

3. 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 (burning oil).

The W-40 has better oil stability than the 5W-30 in the particularly high engine temperatures.

Third, the choice of oil model should be in accordance with the provisions of the car manual, after all, not all manufacturers' engine design is the same.

American engines are relatively precise (small clearance), so it is appropriate to use 5w30 engine oil (low viscosity).

German cars are usually turbocharged engines, and the clearance will be relatively large, so you have to choose 5w40 (high viscosity) oil.

Japanese and Korean cars use more viscous oils. The European system uses a viscosity of 40.

According to the recommended viscosity viscosity engine oil in your car maintenance manual, the performance is slightly better in urban fuel consumption and low-speed torque response, but the disadvantage is that the high speed in the engine is relatively weak at 30, after all, the shear value is lower by 3If you focus on the driving experience in the mid to high rev range, you can achieve a viscosity of 530 4With the same brand and series, the best state of 30 to 20 can last longer, because the attenuation characteristics of the engine oil have a reference that the more you use it, the thinner it becomes5

Distinguish between medium-high rpm and medium-high speed.

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.

It depends on the vehicle.

First of all, it should be added according to the vehicle manual. If the manual allows you to add 5w30, but the vehicle is already more than ten years old, you can add it to 5w40.

Fully synthetic engine oil 5w40 is better to use well in winter and 5w30 in summer.

The viscosity is different, there is no such thing as good or bad, depending on which viscosity the car is suitable for.

Summary. Hello dear, it's all synthetic engine oil, and this doesn't distinguish between good and bad. First, the difference between fully synthetic motor oil 5w30 and 5w40 is the viscosity

The viscosity of fully synthetic motor oil 5w30 is 30; Fully synthetic motor oil 5w40 viscosity is 40. Second, in layman's terms, 5w40 is more viscous than 5w30 oil, so the better the protection performance at high temperatures. Thirdly, the oil grade recommended by different model manufacturers is different, so according to the engine oil recommended by the manufacturer, the oil-related addition can be

Kiss Hello Peiqin, they are all fully synthetic engine oils, and this does not distinguish between good and bad. First, the difference between fully synthetic engine oil 5w30 and 5w40 is that the viscosity is different: the viscosity of fully synthetic engine oil 5w30 is 30; The viscosity of fully synthetic motor oil 5w40 is muffled 40.

Second, in layman's terms, the viscosity of 5w40 is greater than that of 5w30 engine oil, so that the better the protection performance in the middle age of high temperatures. Thirdly, the oil grade recommended by different model manufacturers is different, so according to the engine oil recommended by the manufacturer, the oil-related addition can be

Hello dear, it's all synthetic engine oil, and this doesn't distinguish between good and bad. First, the difference between fully synthetic engine oil 5w30 and 5w40 is that the viscosity is different: the viscosity of fully synthetic engine oil 5w30 is 30; Fully synthetic motor oil 5w40 viscosity is 40.

The first judgment is that the viscosity of 5w40 is greater than that of 5w30 engine oil, so that the better the protection performance at high temperatures. Thirdly, the oil grade recommended by different model manufacturers is different, so according to the engine oil recommended by the manufacturer, the oil-related addition can beHello, I wish you a happy family, if necessary, you can continue to consult, I will always wait for you to reply to the kiss and repentance banquet kiss.

Fully synthetic engine oil 5w40 is good.

The protection performance of 5w40 is better than that of 5w30 at high temperatures. The smaller the number in front of w, the smaller the low temperature viscosity concession, the better the low temperature fluidity, and the lower the applicable minimum temperature. The higher the number after the w, the more viscous the oil.

The following numbers mainly refer to the index of the high temperature resistance of the engine oil, and the larger the value, the better the protection performance of the engine oil at high temperatures.

Fully synthetic motor oil

The winter oil grades of SAE lubricating oil viscosity classification are: 0W, 5W, 10W, 15W, 20W, 25W, the symbol W represents winter, the smaller the number before W, the smaller its low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature.

The higher the number, the greater the viscosity of the summer oil grade, and the higher the maximum temperature.

The winter and summer general oil grades of SAE lubricating oil viscosity classification are: 5W W W-50.

The smaller the number for the winter portion (the lower the applicable minimum temperature) and the larger the number for the summer portion (the larger the applicable maximum temperature), the larger the applicable temperature range.

Summary. Hello dear, 5w30 in synthetic motor oil is better than 5w40. Because 5w30 is thinner than 5w40, the low-temperature fluidity of these two oils is the same. 5w30 is more fuel-efficient than 5w40.

Hello dear, Wang Potato 5w30 in synthetic engine oil is better than 5w40. Because 5w30 is thinner than 5w40, the low-temperature fluidity of these two oils is the same as that of the trapper. 5w30 is more fuel-efficient than 5w40.

Pro, the number in front of 5w40 is marked with the symbol representing the winter oil with the Chang brand symbol W. 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 culture chop temperature. The numbers at the back represent the oil brands for the summer.

The higher the number, the higher the viscosity and the higher the maximum temperature at which it can be used.

Pro, the viscosity of 5w40 is greater than that of 30, and the fuel consumption is higher. If you often run short distances or in winter, it is recommended to change the 5w30 viscosity oil, and if you often run long distances or use it in summer, it is recommended to change the 5w40 viscosity of the engine oil.

Pro, the use of fully synthetic engine oil is 1 year or 10,000 kilometers or so to change once, the specific depends on the driving conditions of the vehicle, but also by relying on the car sense of the base to judge, if you feel that the engine shakes obviously, and the sound of the nose becomes louder, then you have to go to the 4S shop as soon as possible to change the oil, the fully synthetic oil molecules are arranged neatly, the ability to resist external variables is naturally very strong, so the physique is better, thermal stability, antioxidant reaction, The resistance to viscosity changes is much stronger than that of burnt silver mineral skin oil and semi-synthetic oil.

Summary. Hello dear, all synthetic motor oils 5w30 and 5w40 have their own advantages and disadvantages. First, 5W-30 refers to the SAE standard viscosity value of this engine oil, "W" means winter, 5W means resistant to external low temperature -30C, the smaller the number in front, the better the low temperature fluidity of the oil, and the lower the available ambient temperature.

Third, Japanese cars in general. Or a car with a turbocharger, which uses the 5w30 class, while the old German car is 5w40.

Hello dear, all synthetic motor oils 5w30 and 5w40 have their own advantages and disadvantages. First, 5W-30 refers to the SAE standard viscosity value of this oil, "W" means winter, 5W means resistant to external low temperature -30C, the smaller the number in front, the better the low temperature fluidity of the oil, and the lower the available ambient temperature. Third, Japanese cars in general.

Or a car with a turbocharger, which uses the 5w30 class, while the old German car is 5w40.

Hello dear, all synthetic motor oils 5w30 and 5w40 have their own advantages and disadvantages. First, 5W-30 refers to the SAE standard viscosity value of this engine oil, "W" means winter, 5W means resistance to external low temperature -30C, the smaller the number in front, the better the low temperature flow of the engine oil, the lower the available ambient temperature, second, different model manufacturers stipulate that the viscosity of the engine oil used is not the same, and the overall performance of these two engine oils is very good, both belong to the fully synthetic engine oil. Third, Japanese cars in general.

Or a car with a turbocharger that uses the 5w30 class, while the old German car sleepily laughs at the 5w40. Hello, I wish you a happy family, if necessary, you can continue to consult, I will always wait for your reply Good luck, everything goes smoothly and life is happy! Kiss kiss kiss.

High temperature viscosity difference 5w30 The high temperature viscosity is lower than 5w40. Engine oil can lubricate and reduce friction, seal and leak prevention, rust and corrosion prevention, shock absorption and cushioning of the engine. Base oil is the main component of lubricating oil, determines the quality of lubricating oil, additives can make up for and improve the lack of base oil, is an important part of engine oil, engine oil is composed of base oil and additives.

Hello, dear debater. The full synthesis machine is 5w30 engine oil, because the 5w40 oil viscosity is high, and the change will increase the phenomenon of imitation refueling consumption and power decrease. High temperature viscosity difference 5w30 The high temperature viscosity is lower than 5w40.

Engine oil can lubricate and reduce friction, seal and leak prevention, rust and corrosion prevention, shock absorption and cushioning of the engine. Base oil is the main component of lubricating oil, the preparation of the stove determines the quality of the lubricating oil, additives can make up for and improve the lack of base oil, is an important part of the oil, the oil is composed of two parts: base oil and additives.

The choice of fully synthetic engine oil 5w30 is due to the fact that it has titanium liquid to strengthen the technical concealment, change the physical and chemical structure of the engine oil, harden under the flame resistant hydraulic oil standard, make the metal materials separate and fiber, and reduce the friction between metal materials. When the working pressure is reduced, the oil is restored to a situation where it can flow freely. Under working pressure, it can provoke stronger performance, reducing friction by 20% that causes performance degradation.

Advantages of fully synthetic motor oil 5w30:1Fully synthetic engine oil 5w30 has good thermal stability and starting performance, which can maintain good lubrication performance at high temperatures, and help stabilize the pressure regulation characteristics of the high-pressure ring of the exhaust valve ring.

2.Fully synthetic motor oil 5w30 has higher wear resistance and prevents wear between worn parts and other components. 3.

Fully synthetic motor oil 5w30 has oxidation resistance and a cavity that prevents excessive wear and tear of engine components at high temperatures. 4.Fully synthetic motor oil 5w30 provides higher protection and can effectively protect automotive engine components from thermal effects.

Brother Bi shirt 5Due to the stronger lubricating performance of fully synthetic engine oil 5w30, it can improve the energy saving of the engine of the car, reduce engine loss and fuel consumption. 6.

Due to the special molecular structure of fully synthetic engine oil 5w30, it can provide a certain cooling effect, reduce the temperature of the engine, and improve the performance of the engine.