What is the difference between semi synthetic and fully synthetic motor oils?

The details are as follows: 1. The base oil is different.

Semi-synthetic motor oils use Group 3 base oils; Fully synthetic motor oil is made from the use of the first.

Class III, IV and V base oils are blended.

2. The replacement cycle is different.

Semi-synthetic engine oil should be replaced once every six months or 7,500 kilometers during use; Fully synthetic engine oil is changed once a year or 10,000 kilometers during use.

3. The applicable temperature is different.

Fully synthetic engine oil can be used at a wider temperature, and in the same working environment, fully synthetic oil can achieve the purpose of protecting the engine with a lower viscosity, while semi-synthetic engine oil has relatively high requirements.

4. The applicable vehicle conditions are also different.

Semi-synthetic engine oil is more economical, small displacement, and smooth driving models; Fully synthetic motor oil can be used in a variety of harsh conditions, or in pursuit of engine maintenance.

5. Different additives used.

The additives used in fully synthetic motor oils have a high content of TBN, which makes the oil last longer and cleans the engine; Semi-synthetic motor oils use additives with low levels of TBN and shortened oil maintenance intervals, resulting in sulfide salt ash.

Semi-synthetic means that only about half of the raw materials inside are fully synthetic, and the other half is mineral engine oil, and fully synthetic is the best.

The difference between semi-synthetic and fully synthetic motor oil is still relatively large. 1. The base oil is different; 2. The replacement cycle is different. 3. The applicable temperature is different. 4. The applicable vehicle conditions are also different. 5. Different additives used. 6. The protection of the engine is different. Fully synthetic motor oil is better than semi-synthetic motor oil in terms of performance, so fully synthetic motor oil is better than semi-synthetic motor oil in protecting the engine and cleaning the inside of the engine.

Fully synthetic oil is highly lubricated and protects the engine better than semi-synthetic oil, and the fuel consumption of a car with a fully synthetic oil will become lower than that of a semi-synthetic one.

The base oil, replacement interval, applicable temperature, applicable vehicle condition, use of additives, stability, protection of the engine, and ** are different between fully synthetic and semi-synthetic engine oils.

Just go directly to the oil of B70, because it is liters, and the oil of B50 4+1 is not different from dozens of dollars.

Class III, IV and V base oils are blended.

2. The replacement cycle is different: the semi-synthetic engine oil is replaced once every six months or 7500 kilometers during use; Fully synthetic engine oil is changed once a year or 10,000 kilometers during use.

3. Different applicable temperatures: fully synthetic engine oil can be used at a wider temperature, and in the same working environment, fully synthetic oil can achieve the purpose of protecting the engine with lower viscosity, while semi-synthetic engine oil has relatively high requirements.

4. The applicable vehicle conditions are also different: semi-synthetic engine oil is more economical, small displacement, and smooth driving models; Fully synthetic motor oil can be used in a variety of harsh conditions, or in pursuit of engine maintenance.

5. Different additives used: the additives used in fully synthetic engine oil have a high content of TNN, which makes the oil last longer and cleans the engine; Semi-synthetic motor oils use additives with low levels of TBN and shortened oil maintenance intervals, resulting in sulfide salt ash.

Fully synthetic means that the base oil is the fourth class base oil, and synthetic is semi-synthetic is the blend of some of the fourth class base oil and mineral oil...

Mineral oil is no longer in vogue, both in terms of quality and low service life. Now semi-synthetic and fully synthetic engine oil are used, which has good engine protection and long service life. And it's also cost-effective.

The replacement cycle is: mineral oil is changed once every 5000 kilometers, semi-synthetic engine oil is changed once every 7500 kilometers, and fully synthetic engine oil is changed once every 10000 to 15000 kilometers.

The first difference between them is that fully synthetic oils are more expensive than semi-synthetic oils. Correspondingly, fully synthetic oils are used in a wider temperature range and have a longer service life; With the same film requirements, synthetic oils can be used with lower viscosities to achieve a big difference between the two oils. First of all, fully synthetic and semi-synthetic refer to base oils.

Base oil accounts for more than 80% of engine oil, so the performance of engine oil mainly depends on the base oil. Redline and Isodo in the United States are used to modify race cars because these vehicles are horsepowered, fast, and hot and need better lubrication.

However, ester oil has poor oxidation resistance and short service life, so it is not suitable for civilian vehicles. PAO is the PAO base oil used by brands such as Mobil One and Chevron. This base oil is characterized by good oxidation resistance, long life, high viscosity at low temperature start, smooth acceleration and good power performance.

It is synthesized and processed using mineral oil and soft wax base oil as raw materials, and the brands that use this base oil are Castrol shell, etc., which is not a fully synthetic engine oil in the strict sense, and because the raw material of the processed base oil is refined mineral oil, not artificial, the overall performance is almost better than the base oil of the PAO formulation, but it is much better than mineral oil and semi-synthetic oil.

This base oil is characterized by being relatively clean and quiet, but with poor smoothness and high speed. Next, let's talk about semi-synthetic, the so-called semi-synthetic is to add part of the synthetic base oil to the mineral oil, mainly to reduce the price, so that car owners can use mineral oil. Semi-synthetic.

In the early stages, synthetic oils were only used in the aviation and racing sectors, and their ** was also very high. In the later stage, some large-displacement turbocharged engines worked in the harsh environment of high temperature and high pressure, and the performance of the base mineral oil was too fast to be competent. As a result, the performance of the oil is improved by blending base mineral oils with synthetic oils, and the performance of the oil is also controlled within reasonable limits.

The differences are: fully synthetic motor oil has higher performance; Fully synthetic motor oil** is more expensive; The production process of fully synthetic motor oil is more difficult; Semi-synthetic motor oil can be made into other automotive products; Semi-synthetic motor oils have a lower cost. On the whole, fully synthetic motor oils are better.

Most of the ropes are used in racing cars, because these vehicles have high horsepower, high speed, high temperature, and need better engine oil is the blood of the car, although it is very important, but there are still many friends who do not know how to choose, and many people will have questions about whether fully synthetic engine oil is better or semi-synthetic engine oil. Lubrication, but ester oil has poor oxidation resistance and short service life, so it is not suitable for civilian vehicles. Mineral oil is a semi-synthetic base oil mixed with various additives by refining the base oil, because its performance decreases quickly, so this oil is generally used in low-grade small-displacement naturally aspirated engines.

Mineral oil is a semi-synthetic base oil mixed with various additives by refining the base oil, because its performance decreases quickly, so this oil is generally used in low-grade small-displacement naturally aspirated engines. In essence, it uses the best ingredients, which are artificially chemically synthesized, the internal molecules are neatly arranged, and all aspects of performance, such as oxidation resistance, viscosity change resistance, etc., are much stronger than mineral oil and semi-synthetic oil. Semi-synthetic engine oil is made by mixing mineral engine oil and fully synthetic engine oil, so it is called semi-synthetic engine oil.

Synthetic motor oil is a kind of artificially manufactured motor oil, in the production process, a variety of natural substances are selected for chemical decomposition, and then synthesized with various other substances, and finally synthetic motor oil is produced. The cycle can reach 10,000 km. Semi-synthetic motor oil has a more similar oil film requirement, synthetic oil can be achieved with a lower viscosity, while semi-synthetic oil needs to use a thicker viscosity than synthetic oil to achieve this requirement.

In other words, fully synthetic oils perform better in the same working environment! plus applicable to models with small displacements of economy; Fully synthetic engine oil can be used in a variety of harsh and harsh conditions, with good resistance to high temperature and low temperature, and is more used in turbocharged engines and high-end luxury cars. The semi-synthetic oil change interval is 5 months or 7000 km.

The maintenance interval of fully synthetic motor oil is 1 year or 10,000 km.

First, base oils are different.

The base oil of a typical fully synthetic motor oil is one grade higher than that of a semi-synthetic motor oil.

The second point is that the applicable temperature is different.

Fully synthetic motor oil is suitable for a wider range of temperatures, just as in the same working environment, semi-synthetic motor oil can be used in higher conditions, while fully synthetic motor oil can achieve the purpose of protecting the engine with a lower viscosity.

Thirdly, the additives used are different.

Semi-synthetic motor oils use additives with low levels of TBN, which shortens the maintenance intervals of the oil. The additives used in fully synthetic motor oils have a high content of TBN, which can play a role in extending the life of the engine and have a certain cleaning effect.

Fourth, the replacement cycle is different.

Compared with semi-synthetic engine oil, synthetic engine oil has a longer replacement cycle, which can be changed once a year or 10,000 kilometers.

Fifth, the applicable vehicle conditions are different.

Fully synthetic engine oil can adapt to a variety of harsh driving environments, after all, its high temperature and low temperature resistance is good, so generally full synthetic engine oil will be used in models with turbocharged engines or luxury models. Semi-synthetic motor oil is used in more economical models.

Sixth, ** is different.

Speaking of **, it must be that fully synthetic engine oil is a little more expensive, after all, the production cost of fully synthetic engine oil is relatively high. Semi-synthetic motor oils are a little more cost-effective.

Therefore, the choice of fully synthetic or semi-synthetic engine oil depends entirely on what kind of engine oil your engine is suitable for, and choosing the right one is the best.

The difference between the two is that the former will be more expensive and the latter is cheaper, the latter needs to be replaced after half a year of use, while the former can be used for a year or longer. The temperature is also different, the former is more heat-resistant, while the latter has higher temperature requirements.

Fully synthetic motor oil is more effective in protecting the engine and cleaning the inside of the engine than semi-synthetic motor oil.

Fully synthetic engine oil is not suitable for any vehicle, for old cars it is recommended to use semi-synthetic engine oil, because the sealing of old cars is relatively poor, and fully synthetic engine oil has low viscosity and good fluidity, and it is easy to leak oil, in this case, it is more appropriate to choose high-viscosity semi-synthetic engine oil.

1. Semi-synthetic engine oil and fully synthetic engine oil are two classifications of engine oil. The difference between the two is that fully synthetic oil is used at a wider temperature and has a longer service life; For the same oil film requirements, synthetic oil can be achieved with a lower viscosity, while semi-integrated grinding oil needs to use a thicker viscosity than synthetic oil to achieve this requirement.

2. In other words, in the same working environment, the purpose of protecting the engine can be achieved with a lower viscosity of fully synthetic oil. Similarly, in the same working environment, fully synthetic oil has a much longer service life than semi-synthetic oil, so although the cost is higher, it is not much higher than mineral oil after comparing the number of oil changes.

The fully synthetic engine oil has better quality, smoother cold start, more fuel saving, longer oil change interval, longer engine service life, and reduced maintenance rate; Due to the superior cleanliness of the fully synthetic oil, the engine body is much cleaner.

Semi-synthetic oil is a lubricating oil made of semi-synthetic base oil, that is, the international three types of base oil, which is purified by hydrofission technology on the basis of mineral oil, and is mixed by mineral engine oil and fully synthetic engine oil in a ratio of 4:6, which is an ideal transition product from mineral oil to synthetic oil.

When conditions permit, adding fully synthetic motor oil is the best choice for vehicles, of course, it has better performance and is more fuel-efficient. Anyway, it is very important to choose a good lubricating oil for the car, especially the new Kunlun Tianrun products, which have the characteristics of wear resistance and durability, energy saving and environmental protection, fuel economy, etc., you may wish to learn more.

I usually use Kunlun's fully synthetic engine oil, which is superior to semi-synthetic and mineral oil in various properties. ** A little higher though. But you must believe that what you do to the car, the car will do to you.

Many people ask me if I have a problem with using semi-synthetic and mineral oils, in fact, there is no big problem with infinitely, but fully synthetic oils will give you a different experience and are worth the money.

▪⋅1.Mineral oil contains a lot of impurities, the oil performance is poor, and it needs to be replaced frequently.

2.Fully synthetic motor oils contain almost no impurities, are far more stable and anti-aging than mineral oils, and can be used for a longer period of time.

3.Semi-synthetic engine oil is blended with mineral engine oil and fully synthetic engine oil, and the effect is in between.