If the 4S shop replaces it with ordinary engine oil, it is said to be synthetic engine oil, how can

You can ask the data of the oil product, specifically the following points: 1. The viscosity index (the larger the value, the better the viscosity temperature of the oil), reaching more than 150, proves that its base oil contains 4 types of base oil (PAO), and more than 160 is almost dominated by 4 categories. 2. The flash point (which can judge the high temperature stability of the oil) is more than 200 degrees to reach the standard of full synthesis.

3. The lower the pour point (indicating the lowest temperature at which the cooled oil can flow), the better its low temperature fluidity, the smoother the engine start, and the reduction of wear during cold start, the reference value should be about minus 35 degrees, and the level of the pour point also depends on the base oil, and the 4 types of base oil have the characteristics of low pour point. 4. High temperature and high shear viscosity (HTHS), indicating the oil film strength of the lubricating oil under high shear conditions at 150, the larger the value, the higher the strength, and the oil film is not easy to break when the engine is running, so that the engine can be better protected. This is the most important indicator, turbocharged vehicles, must be used with fully synthetic engine oil.

The engine with a supercharger can bring a refreshing push back feeling at the moment of acceleration, but when the turbine starts to work, the engine torque will increase exponentially, and according to the principle of turbocharging technology, the oil film covering the engine crankshaft at this time will bear several times higher shear force than before, so the oil with a value greater than HTHS belongs to the category of fully synthetic engine oil.

The oil cannot be distinguished....It's really impossible to tell.

The 4S shop recommends using fully synthetic motor oil. In addition to the highest level of fully synthetic engine oil, all other advantages are all. WhileMineral oilIn addition to being cheap, everything else is a disadvantage.

Semi-synthetic motor oils fall somewhere in between.

Whether you need to use a fully synthetic motor oil or not depends on what the engine is. If it is a very precise engine, the main engine manufacturer recommends that fully synthetic engine oil must be used if it uses 0w 20 viscosity engine oil.

There are three main categories of motor oils:

Ordinary minerals, the cheapest, 3000 kilometers or 5 months to change, the so-called original engine oil is this. The first gift of the 4S store is also this kind.

Semi-synthetic engine oil, also known as synthetic technology oil, **medium, 6000 km or 6 months to change.

Fully synthetic engine oil, **the most expensive, 10,000 kilometers or 1 year to change. Although it is expensive, it has good performance, and it can be changed once and twice.

Motor oils are divided into mineral oils, semi-synthetic oils, and fully synthetic oils. Among them, mineral engine oil is based on petroleum-refined mineral oil, and is manufactured with additives, which is relatively low and can provide general protection. Semi-synthetic engine oil is a lubricating oil made of a certain proportion of synthetic oil and mineral oil, and its performance is between synthetic oil and mineral oil, which is an ideal transition product from mineral oil to synthetic oil.

Fully synthetic engine oil: In order to get better performance engine oil, human beings have synthesized various engine oils using chemical methods, which is chemical synthetic engine oil, referred to as synthetic engine oil. In terms of performance, fully synthetic oils are superior to semi-synthetic oils and mineral oils.

Go to the four S shop to maintain the coupon with fully synthetic engine oil, fully synthetic engine oil is very good. Fully synthetic motor oil is one of the best among motor oils. Unlike semi-synthetic motor oils, the maintenance time is not the same.

Of course, fully synthetic engine oil is better, and the general replacement interval can be extended to 10,000 or even 12,000 kilometers, but ** high. Semi-synthetic engine oil is not as good as fully synthetic, generally 7500 kilometers to change once, ** lower.

The performance of fully synthetic engine oil is relatively good, but it is a bit expensive, and it is better than semi-synthetic engine oil for the engine.

Compared with semi-synthetic oils, fully synthetic motor oils have the following characteristics.

Base oils for fully synthetic and semi-synthetic motor oils.

Fully synthetic motor oils have a long service interval.

It depends on the vehicleJoint venture carThe oil sent is basically semi-synthetic, and if you want to use a fully synthetic oil, you need to make up the difference.

Requirements:

As a kind of machinery, the engine has its common requirements for lubricating oil compared with general machinery, such as appropriate viscosity, certain performance requirements such as anti-oxidation, anti-wear, anti-corrosion and viscosity temperature. However, the engine is a special kind of machinery, and its requirements for lubricating oil have its special side, and its particularity mainly includes:

1) The overall requirements for the engine are small size, light weight, compact mechanism, and output power.

To be large, so it bears a large load on its unit friction surface.

2) In addition to frictional heat, there is also heat of combustion.

Therefore, the temperature of the friction surface is very high, so that the viscosity of the lubricating oil decreases, and the formation of the oil film is more difficult.

3) The combustion gas in the combustion chamber will leak to the crankshaft through the gap between the piston, the piston ring and the cylinder liner.

Tank, these combustion gases are the gases and certain particulate matter (soot) produced by the complete and incomplete combustion of fuel oil and a small amount of lubricating oil, which usually become the main component of crankcase blow-by, which will contaminate the lubricating oil and promote its oxidation under certain conditions.

4) The lubricating oil required around the combustion chamber enters through the gap between the piston and the cylinder liner, and the gap between the valve stem and the valve guide, so the oil supply is more difficult.

5) Parts such as pistons and valves reciprocate when working, so the relative speed at the upper and lower dead center.

is zero, making it difficult for the oil film to form. The piston pin and bushing are in oscillating motion, and the oil film is difficult to form.

6) When the engine is stopped and runs for a long time, the temperature difference is very large, and due to the thermal expansion and thermal deformation of the parts, it is difficult to control the constant gap of some friction pairs, which may cause adhesion and sintering due to too small gap, and may also cause damage due to impact and vibration due to too large gap. In these cases, the oil film is difficult to adhere.

7) There are many kinds of friction pairs in the engine, such as pistons and cylinder liners, crankshaft journals and bearings, and cams.

and followers, gears, etc., although they have different requirements for the lubrication performance of lubricating oil, only one lubricating oil can be used in an engine (except for large marine diesel engines), so a variety of lubrication states should be taken into account when selecting lubricating oil.

8) The use environment of the vehicle engine is complex, such as air temperature, humidity and atmospheric pressure.

Dust and other changes are greater. At the same time, because engine oil often contains sulfur, lead and other elements, it will promote the corrosion and wear of certain parts.

The above content reference: Encyclopedia - engine oil

4S maintenance is generally given to mineral oil, that is, ordinary oil, if you have requirements before buying a car (be sure to give money before, if you give money and then mention this treatment, the fourth son is like this, you are the emperor before giving money, and you are Brother Qi after giving money) Otherwise, it is impossible to change you for fully synthetic engine oil, if you have to change, only to make up the difference, and then give a suggestion to the fourth son to do the maintenance of the best supervision throughout the process, otherwise your price difference will be gone!

This depends on what kind of engine oil is written on the maintenance contract you send, if it is not indicated, then the most basic mineral engine oil is used for free. If you want to change to fully synthetic engine oil, you need to make up the difference.

Shouxian 4s to send maintenance is basically ordinary mineral engine oil, if you want to change the full synthetic engine oil, you have to add money, generally ordinary mineral engine oil more than 100 pieces of 4 liters and 4 liters of fully synthetic engine oil 4 liters to about 300 to 400 (4 sons are much more expensive than the outside), then at least 200 yuan or so, in addition to give a advice, in the 4 sons of maintenance must be accompanied by the whole process, if otherwise the money can not be used!

The oil used in the maintenance of the 4S shop may not be the best, but it is the most suitable for the brand of cost-effective oil, the general self-priming engine model 4S shop will mostly use mineral oil, cheap, short maintenance cycle, after all, the 4S shop is to make money by maintenance, turbine engine models are generally fully synthetic oil, good performance, long maintenance cycle, relatively high, maintenance before the after-sales personnel will ask the owner what oil to use, change the high-grade oil is required to add costs.

The original engine oil used in the 4S shop for maintenance, only the original engine oil of the vehicle with a turbocharged engine is fully synthetic engine oil, and you can negotiate with the 4S shop to add some money to replace the fully synthetic engine oil.

The maintenance of the 4S shop is a special car oil, depending on what kind of car you have, the generally better car is now basically a fully synthetic engine oil.

Generally, the engine oil used in the maintenance sent by the 4S store is the engine oil used in the normal maintenance of the 4S store.

Beijing Xiaoma Brother Car Repair will answer for you: Generally, the four-S shop will not change you for fully synthetic engine oil, it is ordinary mineral oil.

This is not necessarily, many times it is semi-synthetic, because it is the original oil, uh, if you want to change it, you can choose to change the brand of fully synthetic oil.

The engine oil sent by the 4S shop for maintenance is the most basic engine oil, what if you want to change to fully synthetic engine oil? In many stores, you can make up the difference.

Hello, the engine oil sent for maintenance in the 4S shop is the most basic engine oil, what if you want to change to fully synthetic engine oil? In many stores, you can make up the difference.

This will not, it is generally the original mineral engine oil, and if you want to change it to fully synthetic, you will make up the difference.

Generally, the original oil is used, and you can also choose the engine oil by yourself, but you need to add money.

Generally, no, it is all base oil, and if you change it to fully synthetic, you need to add money.

There will be a ** subsidy for four-s maintenance, so you can ask her whether she uses synthetic engine oil or four-zero engine oil? He'll tell you.

The engine oil used in the Volkswagen 4S store will be equipped with fully synthetic, semi-synthetic or mineral engine oil for maintenance models, which should be marked on the outer packaging of the engine oil.

No automobile factory produces engine oil, the engine oil is provided by large oil refining companies, such as Mobil, Great Wall, Shell, Castrol, etc., for example, the original engine oil of FAW-Volkswagen is produced in Shenzhen, by Shunchang lubricating oil OEM.

Most of the original engine oil provided by the 4S shop is mineral oil, and if the customer is at a reasonable price, the fully synthetic engine oil can also be replaced.

Car maintenance oil change oil can be changed to a different oil. When changing the oil, it is necessary to learn the right oil according to the local climate. Engine oils can be classified into different types according to their viscosity and quality.

If your car is used in the cold region of Northeast China and has undergone regular maintenance before winter, then the oil used is likely to be a model that is resistant to low temperatures and performs better in a cold start environment.

However, as the temperature warms up, changing the appropriate grade oil will ensure that the engine is in optimal working order. Car owners who are not involved in changing the oil label must not be careless. When the vehicle is fully cooled, you can check the scale of the dipstick yourself, and if the oil level is below the minimum value, you need to add it.

Can I change my fully synthetic motor oil to regular motor oil? Can I change my fully synthetic motor oil to regular motor oil? Fully synthetic motor oil cannot be changed to regular motor oil:

1. Fully synthetic engine oil can be changed once a year. In the same working environment, the service life of fully synthetic oil is much longer than that of semi-synthetic oil, so although the cost is higher, it is not much higher than mineral oil after comparing the number of oil changes; 2. Synthetic engine oil is the product of modern chemical technology progress. There are many advantages of synthetic engine oil, such as the lubricity of synthetic engine oil is higher than that of mineral engine oil, low friction resistance, not easy to oxidize, and strong cleanliness; 3. Semi-synthetic engine oil and fully synthetic engine oil are two classifications of engine oil.

The biggest difference between the two is that the fully synthetic oil is used at a wider temperature and has a longer service life; The same oil film requirements can be achieved with a lower viscosity of synthetic oils, while semi-synthetic oils need to use a higher viscosity than synthetic oils to achieve such requirements. In other words, in the same operating environment, a fully synthetic oil can protect the engine with a lower viscosity. @2019