How do we choose lubricants for our cars?

1. Industrial lubricating oil for gasoline engines cannot be used for diesel engines. The diesel engine industrial lubricating oil cannot be replaced by a special gasoline engine industrial lubricating oil, so as not to accelerate the wear and tear of the diesel engine. In principle, gasoline engine industrial lubricating oil and diesel engine industrial lubricating oil should be used separately, and can only be substituted or used within the indicated level range when the automobile manufacturer has a substitute description or indicates that it is a general oil for gasoline engine and diesel engine.

2. The viscosity of industrial lubricating oil should be as small as possible. On the premise of ensuring reliable lubrication of the engine, the viscosity of industrial lubricants is as low as possible. Viscosity industrial lubricants are only suitable for some heavily worn engines, except for use in the southern summers.

The blind use of high-viscosity industrial lubricants will increase the resistance of the engine when it is running, which will increase fuel consumption. The selection of industrial lubricating oil with too low viscosity may make the pressure of industrial lubricating oil too low, the strength of the lubricating oil film is not enough, and the sealing is not strict. Therefore, it is necessary to correctly select industrial lubricants according to vehicle conditions and seasons.

3. Adhere to the principle of economic applicability. When choosing the use grade of industrial lubricants, high-grade industrial lubricants can be used in engine sand deer with lower requirements, but it is not economical to use too many downgrades. Do not use a lower grade of industrial lubricant in a demanding engine, as this can cause early wear and damage to the engine.

4. Multi-grade oil should be used as much as possible。Multi-grade oil has good viscosity and temperature performance, can be used in the engine for a long time, saves fuel, and is common in all seasons, easy to manage. When using multi-grade oil, the oil color is easy to turn black, and the pressure of industrial lubricating oil is less than that of ordinary industrial lubricating oil, which is normal and does not affect the use.

5. Domestic brand-name industrial lubricants should be preferred. Domestic industrial lubricants are of high quality and low price (only 50%-60% of imported industrial lubricants), and large domestic refineries can produce high-grade lubricants that meet international standards, so you can choose them with confidence.

, about the mixing of industrial lubricants。Single-grade industrial lubricants and multi-grade industrial lubricants should not be mixed; Different grades of industrial lubricants can be temporarily mixed if necessary, but should not be mixed for a long time.

I think you should choose the kind of lubricant that is more suitable for your car, and you can listen to the advice of the maintenance staff.

This one selects different lubricating oils according to different cars, try to choose some good effects, it also has a certain effect on the car.

The choice of lubricant is related to the type of vehicle you have, and it should be chosen according to different situations.

It's best to buy the package directly, after all, it's more expensive at the beginning.

I think the lubricant used in each car is different, and it depends on the vehicle.

First of all, it is necessary to select the appropriate composition according to the performance of the car, and try to have a good lubrication effect, and the viscosity is small under this premise.

You can go to the 4S shop to find a professional to ask, each car has its own suitable.

Choose the right lubricating oil according to the actual situation of your car, and be careful not to mix.

Choose a big brand, and gasoline engine lubricants and diesel engine lubricants cannot be mixed.

By understanding the relevant expertise, ask the relevant professionals to choose the right one for you.

There are generally three types of engine oils on the market: mineral engine oil, semi-synthetic engine oil, and fully synthetic engine oil. Different brands of motor oil** are also different.

Mineral motor oil is a base oil extracted directly from petroleum and synthesized after removing impurities. The molecular structure of mineral oil is not very stable and it is relatively cheap. It is not recommended to choose this oil.

Semi-synthetic engine oil, which is a mixture of mineral oil and fully synthetic engine oil, decays more slowly, and it is recommended to replace it after 7,500 kilometers.

Although fully synthetic motor oil is the most expensive, it protects the engine well, has better lubricity, and has a mileage of 10,000 kilometers to replace.

Which one is suitable depends on how you choose.

Hello, lubricating oil plays a role in lubrication and reducing friction, you can buy a special brand, you can also buy an old brand is no problem.

Answer: Personally, it is recommended to buy or maintain it in a large fast insurance store or 4S store.

Lubricating oil is a liquid or solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts, mainly playing the roles of lubrication, cooling, rust prevention, cleaning, sealing and buffering. The normal operation of the engine is inseparable from the lubrication of the oil, and the lubricating oil contains a variety of additives that can effectively protect the important moving parts of the engine. At present, all kinds of lubricating oils on the market are mixed, so that many car owners do not know what lubricants they really need to buy to meet the needs of their cars.

How to choose lubricant First of all, you need to understand whether your car is naturally aspirated or turbocharged. The lubricants used in naturally aspirated and turbocharged vehicles are also very particular. Naturally aspirated vehicles have low requirements for lubricating oil, and generally can choose refined mineral oil or better semi-synthetic oil.

Turbocharged cars must be made with fully synthetic oils. The oil temperature of the naturally aspirated car is usually within 100, and the standard oil of 30 (oil film thickness) is enough to protect the engine. Turbocharged vehicles have high calorific power and can easily exceed 100 oil temperatures.

Generally, it is necessary to use 40 standard or above fully synthetic motor oil. Lubricating oil replacement Under normal circumstances, most cars should be changed at 5000 kilometers when they reach the specified oil change mileage. But this number of kilometers is not inevitable.

In fact, due to the different engine conditions, oil used and use environment of each car, its reasonable oil change interval should also have certain differences, and cannot be generalized. The owner should decide the oil change interval according to the actual driving, road conditions, vehicle conditions, and oil quality. Even for new cars, the oil change interval can be appropriately extended.

But it should not exceed 7500 km, and even the best oil will change its chemical properties after a certain mileage. Finally, all kinds of oils have the characteristics of various oils, and there is no perfect one, but you don't come to experience what suits you, or gradually improve it. You can know the importance of oil to the car, and the small displacement of the car with a good oil can make the car more powerful and smooth, bringing the fun of driving is incomparable with ordinary engine oil.

Hello, after reading your question, I personally think that the full synthesis of Castrol or Shell is enough for the general family car.

1. Choose the right type of lubricating oil for your car.

Synthetic engine oil has good stability, good fluidity, long oil change interval, and can protect the engine to the greatest extent, so it is basically suitable for most models. However, because fully synthetic motor oil** is generally higher, some small cars with small engine loads in the industry prefer semi-synthetic or mineral oil for economic reasons. In addition, the grade of engine oil products can only be improved, not reduced.

For example, it is stipulated that semi-synthetic oil can be replaced with synthetic engine oil, and it is stipulated that synthetic engine oil cannot be replaced with semi-synthetic oil.

2. Choose the right viscosity.

First of all, it is recommended that you use the specifications recommended by the vehicle manufacturer, but note that the viscosity guidelines of the automobile manufacturer for organic oil are only for the consideration of an average value, and you can refer to the car environment to choose the engine oil. For example, if the environment is colder than most places or the engine load is higher than most vehicles, the smaller the number in front of W, and the larger the number of the small bar (for example, SAE 5W-30 is recommended, 0W-30 can be considered in colder environments or 5W-40 in hotter environments).

3. Judging according to the age of the car.

For old cars that have been driven for more than 10 years and have a mileage of more than 200,000 or even 300,000 kilometers, you can consider using 15w w-50 such high-viscosity oil, the advantage of this oil is that the sealing will be better, it is easier to maintain oil pressure, reduce oil consumption, and most of this oil is mineral oil. If an old car uses a low- to medium-viscosity oil, it may cause insufficient oil pressure, which will not meet the lubrication needs of the engine, aggravate wear, and be harmful and unprofitable.

4. According to the mileage traveled by the car.

If you care more**, and there is more mileage, change the engine oil more frequently, and use mineral oil and some synthetic oil, but if you drive very little, only change the oil once a year, it is recommended to use a better, fully synthetic oil. As for the viscosity grade, for example, some European and Japanese manufacturers, in recent years, for the sake of environmental protection and fuel saving, will recommend the use of low-viscosity engine oil such as 5W-20, as long as you follow the manufacturer's recommendation.

5,8. Unconventional driving (traffic jams).

Both the maintenance manual and the self-purchased oil refer to the change cycle in the case of "general driving", i.e. driving on the highway a lot and rarely stopping and walking. If there is a frequent traffic jam, it is recommended to shorten the mileage of oil change by 20-30%, that is, 3500-4000 kilometers for ordinary minerals and 5500-6000 kilometers for semi-synthetic engine oil; Fully synthetic motor oil is 7500-8000 km.

1. Select according to the working conditions of the equipment.

1. If the load is large, choose the oil with high viscosity, oiliness or good extreme pressure bonding; If the load is small, choose an oil with low viscosity; When the impact is large, the oil with high viscosity and good pressure should also be selected.

2. Low viscosity oil is selected for high movement speed, and oil with higher viscosity can be selected for low-speed parts, but for oil products with anti-wear additives, high viscosity does not need to be overemphasized.

3. The temperature temperature is divided into ambient temperature and working temperature. If the ambient temperature is low, the viscosity and freezing point (or pour point) of the lubricating oil are low, and the opposite can be higher; If the working temperature is high, choose a lubricating oil with high viscosity, high flash point and good oxidation stability, and even choose a solid lubricant; If the temperature range is large, it is necessary to choose a lubricating oil with good viscosity and temperature characteristics (high viscosity index).

4. For the working conditions of environmental humidity and wet environment in contact with water and more contact with water, lubricating oil with strong demulsibility, oiliness and rust resistance should be selected.

The oil products recommended in the equipment manual can be used as the main reference for oil selection, but it should be noted that with the progress of technology, inferior oil products will be gradually eliminated, and it is economically cost-effective to reasonably choose high-quality oil products. Therefore, even if it is an old equipment, it should not continue to use the obsolete inferior oil; The lubricating oil used in imported and advanced equipment should be based on domestic production.

Breakthrough lubricating oil quality is guaranteed! Breakthrough Lubricants and Uni-President Lubricants both belong to the companies of Huo's Group.

According to the displacement, which level of engine oil is suitable for the car.

For cars, it is recommended to choose SG or higher oil for cars with a displacement of less than 1 liter. For cars with a displacement of more than 1 liter, it is recommended to use lubricating oil of SH grade or higher. For cars with a displacement of more than 1 8 liters, it is recommended to use SJ and SL level lubricating oil, and the unified classic pure synthetic engine oil APISL SJ5W 40 lubricating oil that is universal in all seasons is a good choice.

The hot summer is coming, and finally how to choose and change engine oil in summer?

Pay attention to the engine's oil warning light or oil pressure gauge, if the oil light is on, stop immediately, and do not continue driving to prevent serious accidents. After stopping, first check whether the oil level is enough (the oil level is between the oil dipstick and the scale mark), if the oil volume is not enough, it should be filled.

Choice of oil. Pay attention to the viscosity of the engine oil when choosing engine oil in summer, and try to choose a higher viscosity level of engine oil, such as etc. Because the viscosity of the lubricating oil changes with the increase of temperature, that is, the viscosity of the lubricating oil decreases when heated, the oxidation resistance becomes poor, it is easy to deteriorate, and even causes failures such as burning tiles and holding shafts.

Therefore, the crankcase and gearbox should be replaced with a more viscous summer lubricating oil, and the amount and quality of the lubricating oil should be checked frequently, and replaced in time.

The engine of a long-distance car (especially an overloaded vehicle) is prone to high temperature in summer, so it is necessary to pay attention to the engine's water temperature gauge or oil temperature gauge, oil warning lamp, and oil pressure gauge. If the oil light is on or the oil pressure is not within the normal range, especially when the water temperature and oil temperature are too high, stop immediately and wait for the engine temperature to drop before driving.

Vehicles that often drive on mountain roads and roads with poor road conditions are also prone to cause the engine temperature to rise, and the viscosity of the vehicle in this case should also be a little larger when choosing engine oil, such as

During the run-in period of summer overhaul vehicles or new cars, do not add high-viscosity lubricating oil, and use lubricating oil or (in addition, be cautious of using things such as repair agents or engine oil) to prevent the occurrence of shaft burning tile accidents.

Where heating is required, the manufacture of lubricating oil is basically a mixture of base oil and additives. Deoxidation is a process used in the production of base oils. Generally, there are white clay and furfural refining (deoxidation), and there are also deoxygenation with full hydrogen process.

The selection of lubricating oil is not only related to the model, but also related to the ambient temperature, vehicle condition, and engine status. For long-term use of high-viscosity waste ore oil, it is best not to change to fully synthetic oil. New cars should choose a less viscous engine oil, so as to ensure that the service life can be run in normally.

During the use of lubricating oil, the viscosity will increase due to the formation of sludge gum. In the process of lubricating oil use, under the action of high temperature and high pressure for a long time, the polymer molecular chain of the guide polymer is broken, resulting in the decline of viscous waste, so the degree of change in viscosity is related to the quality of lubricating oil.

As for what viscosity oil is used in the engine, it is related to the climate and the working condition of the engine. For example, the temperature in the south is higher than that in the north, and the viscous waste of the engine using lubricating oil under the same working conditions in winter and spring and autumn is slightly higher. In addition, the working temperature of the gas engine is dozens of degrees higher than the temperature of the fuel engine, in order to maintain the stability of the oil film at high temperature, the viscosity of the oil is relatively higher, and the high-temperature sealing between the piston and the cylinder block of the old engine is maintained, and the gas engine lubricating oil is also required to have better viscosity and viscosity stability.

In addition, to evaluate the quality of a lubricating oil, mainly look at its viscosity stability performance, the viscosity is thicker, suitable for the old engine with a large piston body clearance, and the oil film is thinner if the viscosity is small, which is suitable for the new engine with a small piston block clearance. However, regardless of whether the viscosity is large or small, the oxidation resistance and deterioration resistance of the oil at high temperature must be good.