What does engine oil 5w 40BM229 5 mean?

5w indicates the operating temperature range of the oilFrom 0W, 5W, 10W, 15W, 20W, 25W, etc., the smaller the number, the better its low temperature fluidity, and the more it can work under low temperature conditions.

40 indicates the viscosity of the oil at 100The grade has SAE, the higher the number, the higher the viscosity, 5W50 is commonly known as multi-grade oil.

BM stands for Mercedes-Benz certification standard.

Oil. It is divided into single-viscosity engine oil (such as SAE30) and multi-viscosity engine oil (such as SAE5W-30), and now most of the vehicles use multi-viscosity engine oil, because this engine oil contains a variety of special additives, so that the oil is easy to flow and non-condensing in a low temperature environment, and in a high temperature environment.

Maintain viscosity and do not decompose.

The smaller the number before w, the smaller the viscosity at low temperatures, the better the fluidity at low temperatures, and the lower the applicable minimum temperature. The resistance during normal use is small, which is conducive to reducing fuel consumption. Now it is also a more economical plan for major manufacturers to reduce fuel consumption, and Lao Hou believes that it will be a trend.

However, the viscosity of the oil is too small, and the oil film is not well formed, which will have an impact on the wear of the engine.

About the standard.

One has to ask, what exactly is the certification standard?

First of all, long mileage is an important metric for MB. It requires the tested oil to have an oil change interval of 25,000 km to 50,000 km, or 3 years, in its specified bench test.

Secondly, it is required to have excellent oil economy. Compared with ordinary engine oil, its oil fuel economy is as high, and the oil saving is even more than MB, which can effectively reduce engine oil consumption.

At the same time, MB's certification standards are more stringent in terms of anti-soot, anti-abrasion, anti-sludge, piston carbon cleansing and anti-oxidation properties.

Engine oil 5w-30 represents the number of engine oil, where 5w represents the minimum starting temperature of engine oil is -30, the more ** the number in front of w, the better the low temperature fluidity of the engine oil; The 30 represents the stability performance of the oil at high temperatures, and the higher the value, the better the stability performance of the oil at high temperatures.

SAE and API will be seen on the outer packaging of the oil. SAE is the abbreviation of the Society of Automotive Engineers, and API is the abbreviation of the American Petroleum Institute. The designation after the SAE indicates the viscosity value of the oil, while the designation after the API indicates the quality level of the oil.

Benefits of motor oil:

1. Lubricity. The ability of engine oil to reduce friction, slow down wear and prevent metal sintering under various conditions is called engine lubricity. The viscosity of engine oil is an important indicator of lubricity.

2. Low temperature operability. From the engine oil aspect, the engine oil is easy to start and reliable to supply oil at low temperatures, which is called the low-temperature operability of engine oil.

The low-temperature operability of engine lubricants includes two aspects: good for low temperature starting and reduced starting wear. The main indicators to evaluate the low-temperature operability of engine lubricants are low-temperature dynamic viscosity, boundary pumping temperature and pour point.

Viscosity index, the smaller the number in front of w, the better the fluidity at low temperature, and the viscosity at high temperature in the back.

1. What does 5w30 mean?

1. It is the label of the viscosity grade of the engine oil, NW, which means N-30 degrees, and it is also said that it is the case of N-35.

2. For example, in the SAE classification, it is divided into low temperature viscosity grade SAE 0W (W represents W, 10W, 15W, 20W, 25W in winter, the smaller the number, the better the low temperature operation.

3. For example, 0w means that it still maintains good lubricity at minus 30 degrees.

1) 5W represents minus 25 degrees.

2) 15W stands for minus 15 degrees.

3) 20W represents minus 10 degrees.

4) 25W is minus 5 degrees.

4. 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.

5. The larger the number after W, the higher the viscosity, and 30 means that the viscosity index of the lubricating oil can be 30 at a temperature of 100 °

2. W stands for winter.

The smaller the number in front of 5W, 10W, and W, the better the low-temperature operation, in addition to the low-temperature viscosity grade, there is also a high-temperature viscosity grade SAE, and the larger the number behind the horizontal bar, the higher the viscosity of the oil. The standard for choosing engine oil is to choose according to the instruction manual of the original car.

The viscosity of lubricating oil is mostly marked by SAE and other grades, and SAE is the abbreviation of the English "Society of Automotive Engineers". For example, SAE40, SAE50 or SAE15W-40, SAE5W-40, "W" means winter, the number before "W" represents the low temperature characteristics of the oil, the smaller the number represents the better the low temperature fluidity, and the more ** the number in front of it, the thinner the viscosity of the oil, which is suitable for use in colder areas; The better the protection of the engine during cold starts; The number after the "W" (after a horizontal line) is an indicator of the high temperature resistance of the engine oil, representing the viscosity level of the engine oil at 100, the higher the number, the higher the number indicates that the oil can still maintain sufficient viscosity at higher temperatures. The better the protection of the oil at high temperatures.

Higher viscosity oil also has relatively high resistance to the kinematic system, which not only consumes power and increases fuel consumption, but also makes the oil easy to oxidize and affects the protection of cold start. Single-grade motor oils such as SAE40 and SAE50 have only one set of values and cannot be used in the cold winter months. There are two sets of values such as SAE15W-40 and SAE 5W-40, 15 indicates that the viscosity of the oil is No. 15 in winter, and 40 means that the viscosity of the oil is equivalent to No. 40 in the summer.

This means that this oil is advanced"Multi-grade motor oil", suitable for a wide range of areas from low to high temperatures, the viscosity value will change with temperature to give the engine full protection.

SAE) applicable ambient temperature (°C): front 5W suitable for -30°C, 10W suitable for -25°C, 15W suitable for -20°C, 20W suitable for -15°C; The back 30 is suitable for 30°C, 40 is suitable for 40°C, 50 is suitable for 50°C, etc.

The existing engine oils in the market are classified according to the SAE method, single-grade engine oil: 6 types of winter oil, 4 types of summer oil, and 16 types of multi-grade engine oil: winter and summer general oil.

The winter oil grades are: 0w, 5w, 10w, 15w, 20w, 25w; The grades of oil used in summer are as follows; The general oil grades in winter and summer are:

5w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w-50.

The 5W-30 on the motor oil indicates the viscosity grade of the motor oil, which is the SAE grade. It is an index of motor oil viscosity developed by the American Society of Motor Vehicle Engineers.

The viscosity of motor oil simply means whether the oil is thin or thick. Low viscosity means relatively thin, and the resistance to relative movement by external force is small; High viscosity means relatively thick, high movement resistance, but good lubrication effect.

At present, most of the vehicles use multi-viscosity engine oil, which contains a variety of special additives, so that the oil is easy to flow and non-condensing in a low temperature environment, and maintains a proper viscosity in a high temperature environment, and still has good lubricating properties.

Meaning of engine oil 5w30: 5w in 5w-30 indicates the performance of oil cold starting. Using an oil with a lower value in front of the engine makes it easier to start the engine in cold weather.

5 out of 30w-30. Indicates the viscosity characteristics of motor oil at high temperatures. A high-viscosity motor oil (with higher values) may be better suited for vehicles traveling at high speeds or heavy loads.

5w30 explained:

5: On behalf of the winter part, it means that the oil has reliable low temperature start-up at minus 30 degrees;

w for winter.

30: The viscosity code of the engine oil, see the table below.

The winter and summer general oil grades of SAE lubricating oil viscosity classification are: 5W W W-50, the smaller the number representing the winter part (the lower the applicable minimum temperature), the larger the number representing the summer part (the larger the applicable maximum temperature), and the larger the applicable temperature range.

The oil mark 5w30 or above is: the operating temperature of the engine oil is between low temperature 5 degrees and high temperature 30 degrees.

1、"w"Indicates a multi-grade engine oil, which is suitable for a wide range of temperatures. In addition to the characteristics of general engine oil, its viscosity can wither within a certain range, thicken when heated, and thin when cold, which can reduce the resistance and wear of the engine.

2. The number in front of W represents the low temperature viscosity index. The lower the value, the lower the low temperature viscosity, and the better the effect when starting at low temperature. It is also possible to understand the "w" to mean winter.

3. The following 30 indicates the high temperature viscosity index. If the value is large, the high temperature performance is better.

It takes an hour to change the oil of a small trolley no.

The number before w indicates the temperature range of the oil, from 0w, 5w, 10w, 15w, etc., the smaller the number, the better its low temperature fluidity, the more it can work under low temperature conditions, such as 0w can withstand low temperature -35, 5w can withstand low temperature -30.

The number after W indicates the viscosity of the oil at 100, and the higher the number is SAE, the higher the viscosity (but the higher the viscosity, the better, it needs to be determined according to the model, vehicle condition, driving environment, and driving habits).

The low temperature resistance of 0w is the best, and the oil quality is also the highest in comparison.

5W-40 is a very common type of motor oil.

The details are as follows.

1."W" stands for winter.

2.The lower the number, the more resistant the oil will be, and it will be easier to start the engine when the temperature is too low.

3."40" stands for the kinematic viscosity standard at 100 degrees Celsius (to), and the higher the number, the better the protection at high temperatures.

Adapted to the model of engine oil 5W-40.

German cars are usually turbocharged engines, and the clearance is relatively large, so you have to choose 5w-40 (high viscosity) oil, and most European cars also use 40 viscosity oil.

For cars that are more than 7 years old, the engine is prone to aging and the degree of wear is more serious, so it is necessary to use 5w-40 engine oil with high viscosity.

Cars that often go at high speeds, the heat and wear of the engine are more serious, it is recommended to use 5w-40 engine oil.

It is better to use 40 will be more suitable, but the quality of 5w40 is not as good as 0w40, or 0w40 is more suitable, I used the original 5w40 before, enough, but there is no special experience, now it is replaced with 0w40 g t magic red engine oil, four types of pao base oil high quality, long-term durability. There is no problem with the change of 15000 public management, and the addition of esters, the power is sufficient, and the driving experience is much better than the previous engine oil.

German cars use 40 viscosity, high engine working temperature, high temperature resistance of the oil, generally use 40, the wrong oil will cause great damage to the engine. Volkswagen has been using G T Magic Red 0W40 engine oil, the base oil of the four types of PAO has good high temperature resistance and recession resistance, and at the same time, there is the addition of liquid molybdenum, strong anti-wear protection, and the driving experience is much better than the previous engine oil.

The quality of 0w engine oil is much better than that of 5w engine oil, Magotan used 5w40 engine oil in winter before, not to mention the slow hot car, and sometimes it takes several times to start the car, which is not small to the engine. Now I have changed to 0W40 G T Magic Red Engine Oil, the base oil of Class IV PAO has good fluidity, the start speed is fast, and the car starts faster when I go out in the morning. There is also the addition of liquid molybdenum, which has good anti-wear performance, which can better protect the engine.

SAE 5W 30 is the compound viscosity, W is the meaning of winter, the smaller the number before W, the smaller its low temperature viscosity, the better the low temperature fluidity, the lower the applicable minimum temperature, the larger the number after W, the greater its viscosity, and the higher the applicable maximum temperature.

Generally speaking, the number before W can be subtracted from 35 to get the low temperature resistance of the engine oil, for example, the low temperature resistance of 5W engine oil is minus 30 degrees, 0W is minus 35 degrees, and 10W is minus 25 degrees.

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 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.

The labels 5W, 30 on the engine oil represent the fluidity of the oil at low temperatures and the viscosity at high temperatures. In general, the smaller the number in front of W, the better the fluidity at low temperatures, and the higher the number after W, which means that the oil will not become thinner at high temperatures.

The performance of my Valeant 100,000 km engine is still good, which should be related to the fact that I changed to imported PAO engine oil earlier. The G T Magic Red I bought only has a high-end mark 0W, so the label is 0W30. The most direct feeling after changing is that the car is very quiet, and the accelerator is not meaty, the power has been very strong, running to 10,000 kilometers before slowly declining, to 15,000 kilometers before you need to change.