What is the difference between car engine oil 5w30 and 0w40, and what is the difference between diff

1..The main difference between 5w30 and 5w40 oils of the same quality class is that 5w-30 has relatively better fluidity and is more capable of reducing fuel consumption and dissipating heat faster and better in the engine.

At high temperatures, 5W-40 will have better oil stability.

2.The following brands of motor oil can be selected, Shell, Castrol, Mobil.

3.Engine oil: changing the oil is the most common item in maintenance, the oil is to lubricate the engine, cooling, shock absorption and cushioning and reduce wear, etc., the oil has a life cycle, so it should be replaced regularly, different types of oil replacement cycles are not the same, and the current oil types are divided into three types:

Fully synthetic, semi-synthetic and mineral oils.

4.Fully synthetic motor oils have better high and low temperature types, and ** are also the highest of the three. The replacement cycle is generally 10,000-12,000 kilometers.

The replacement interval of semi-synthetic engine oil is 8,000-10,000 km. Mineral oil is generally replaced at 5,000 km.

0w oil is better than 5w oil at low temperature, 40 oil is more viscous than 30 oil, different brands of oil performance is definitely different, my car used Castrol 5w30 oil, the performance is OK, but the maintenance cycle of about 8000 kilometers is too short, now the GT oil 0w30 oil, PAO base oil, the performance is better, the maintenance cycle has reached about 15000 kilometers, which is the most expensive.

I asked this question in the store, 30 and 40 are mainly different in viscosity, for example, the Volkswagen car is suitable for 40. Or it is a car with a relatively long age, and it is also suitable for a higher viscosity.

5w30 is good.

5w30 and 10w40 represent the viscosity of the oil, the number in front of w represents the minimum operating temperature, the smaller the number, the better the low temperature start-up performance, and the back of w represents the maximum ambient temperature.

Gasoline engine oil is represented by S, diesel engine oil is represented by C, the letter after S or C indicates the grade, and ABCD is used to the back, A is the lowest, and the further back the quality, the better the luck.

Engine oil, i.e. lubricating oil, has six major functions:

1. Lubrication and friction reduction: The engine oil is often called lubricating oil, as the name suggests, it is used for lubrication. There is a rapid relative slip between the piston and the cylinder, between the spindle and the pad, and to prevent the parts from wearing out too quickly, an oil film needs to be created between the two sliding surfaces.

An oil film of sufficient thickness separates the surface of the relatively sliding part to reduce wear.

2. Cooling and cooling: In addition to cooling the engine with coolant, the engine oil can also bring the heat back to the oil tank and then dissipate it into the air to help the water tank cool the engine.

3. Cleaning and cleaning: good oil can bring carbide, sludge and wear metal particles on the engine parts back to the oil tank in circulation, flush the dirt generated on the working surface of the parts through the flow of lubricating oil, and then filter the solid particles through the oil filter element to maintain the internal cleanliness of the engine.

4. Sealing and leakage-proof: the engine oil can form a sealing layer between the piston ring and the piston to reduce gas leakage and prevent external pollutants from entering.

5. Anti-rust and anti-corrosion: lubricating oil can be absorbed on the surface of parts to prevent water, air, acidic substances and harmful gases from contacting parts.

6. Shock absorption and buffering: when the pressure of the engine cylinder port rises sharply, the load on the piston, piston chips, connecting rod and crankshaft bearing is suddenly aggravated, and the load is transmitted and lubricated by the bearing, so that the impact load is buffered.

What is the difference between car engine oil 5w30 and 0w40, and what is the difference between different brands?

The main difference between these two gasolines is that the smaller the number in front of W, the better the fluidity of the oil when the engine oil is started in a cold car. The higher the number after the w, the better the lubrication performance of this oil to the engine at high temperatures. It also means that the fluidity of this 5W-30 oil under cold start is not as good as 0, and that of W-40 oil.

The W-40 has better fluidity for cold starting, and the lubrication of the engine is better at high temperatures. If this brand is different, as long as the model is the same, it is the same on the basic carrying, because the base oil in it, including the lead additive in it, is the same, there is no difference.

The low-temperature fluidity and high-temperature viscosity of the two oils are different. 5W oil can flow normally at minus 30 degrees Celsius, and 0w oil can flow normally at minus 35 degrees Celsius. 30 oil has a lower viscosity than 40 oil, and the oil film with high viscosity is more stable.

Engine oil is something that every car owner needs to come into contact with when using the car. Engine oil is known as the blood of the engine. If there is no oil in the engine, the engine will not function properly.

Engine oil not only plays the role of lubrication branch buffer in the engine, but also plays the role of cleaning, sealing, buffering, rust prevention and heat dissipation.

When the engine is running, the oil will form an oil film on the surface of each component in the engine, which can prevent friction caused by direct contact between the parts in the engine. If the parts in the engine are in direct contact to produce friction, it will aggravate the wear of the engine, and it will also lead to a large amount of heat in the engine instantaneously, which is fatal to the engine.

The performance of the engine oil will be reduced after a long period of use, so it is necessary to change the oil regularly.

If you don't change the oil for a long time, it will increase the wear and tear of the engine.

It is recommended that you change the oil regularly when you are using the car, and change the oil filter with each oil change.

Oil Filters The filter element is used to filter the oil. Without an oil filter, the oil will get dirty after a period of use.

The differences between 5w30 engine oil and 0w40 engine oil are: 1. The low-temperature fluidity of engine oil is different; 2. The viscosity of high temperature is not the same: w engine oil can be called in a state to flow normally at a temperature of minus 30 w engine oil can flow normally at a temperature of minus 35 engine oil is lower than forty engine oil, and the oil film is more stable than engine oil with lower viscosity and high viscosity. Cars that use 5w30 oil can be changed to 0w40 oil.

However, only one viscosity needs to be added. Of course, German cars with a 40 viscosity do not need to be changed to 50 viscosity oil. One is that it does not meet the engine standards, and the other is that it will affect the driving experience.

Switching from 5W oil to higher quality 0W oil can give you a better driving experience, better engine maintenance, and longer service life.

The difference between engine oil model 5W-30 and 5W-40: W stands for winter, which means that it is used in winter; The 5 in front of w represents the viscosity at low temperatures; The lower the value, the higher the fluidity and cold resistance at low temperatures. 40 can be used in the summer when the temperature is below 40 degrees, and 30 can be used when the temperature is below 30 degrees.

There are 6 kinds of winter oils, 4 kinds of summer oils, and 16 kinds of winter and summer general oils.

1.The grades of winter oil are 0w, 5w, 10w, 15w, 20w, and 25w. The symbol W stands for winter. The smaller the value before w, the smaller the low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature.

2.The grades of summer oil are respectively. The higher the value, the higher the viscosity and the higher the applicable maximum temperature;

3.The grades of winter and summer general oils are 5w w w w-50.

If the viscosity is too high and the oil is too thick, the oil cannot be delivered to the parts in a short time, which will increase the wear at start-up, make it difficult to start at low temperatures, make the cleaning function and cooling heat dissipation function worse, and increase the power loss and fuel consumption. The viscosity is too low, the oil is too thin, the parts cannot be effectively absorbed, the lubrication, anti-wear, and sealing functions cannot be played well, and the fuel consumption also increases. In principle, as long as the oil does not deteriorate and the quality is good enough, the oil film will always exist, giving full play to the performance of the oil and protecting the car.

However, if the oil contains more water, the lubricating performance and viscosity of the oil will deteriorate, the friction reduction effect of the oil film will also deteriorate, and the deterioration of the oil is inevitable, which may also lead to more serious accidents, such as engine shaft holding, tile burning, etc.