Part 1. First quite a bit theory
These auto oils were originally created for aviation, without them anywhere, at the temperature of the incident flow -40 C ° and on the revolutions of about 10,000 s ° - without synthetic. In such conditions, the usual oil is more like rubber than automotive oil.
These auto oils have unique properties here are some of them:
1. Very wide range of operating temperatures.
2. The ability to operate at very high temperatures and pressure.
3. Very high resistance to polymerization (the formation of lac-like-like films) and they are in other places as they protect.
4. High detergent (by the way, a dop-blooded engine of car VAZ Zhiguli or a Volga gas from the inside looks like a new - clean!).
5. Beautiful (level) viscosity characteristic in the working range of temperatures (70-150 s °) - by the way one of the main reasons for the destruction of the doptop engines.
6. Low evaporative ability - the neutralizer regret - good means (but not for cars: Zhiguli and Volga).
But there are disadvantages (although not so significant):
1. High chemical activity (compensated by a large number of additives at least 25%).
2. High surface activity helps additives (antiofrication, anti-failed, compensation, -) penetration into the surface of the metal. Replacement material.
3. High corrosion activity is also compensated by additives.
4. Low level Compatibility with mineral oils (but when you "merged" the old oil and flooded a new 15-25% old oil still remained in the engine so that the motor is the following 10 thousand. Work on this poorly compatible mixture.). In one cart, it is not possible to catch a horse and stray lan! At least not a board.
The result is definitely in favor of synthetic oils The similar list for mineral oils looks where as saddest.
The love of the Russian people to all the good and rich is well known. I can not buy Mercedes so I can buy oil in Lyguli as in Merine - it's cool in kind! Doro! Synthetic! And the coolest add: SJ by aPI classification (Zhiguli, then I took in 1996) 0W40 (by SAE) - Well, exactly class!
But if feeding a pig gold coins, it is unlikely to get fat faster! Equally how bad it understands oranges, just as bad soviet engine It disassembles in good oils, just as bad even a good motorist disassembled in the design and modes of operation of the engines. This helps him believe that it understands the oils much better than the "grandfathers", which all life calculate the lengths and cross-section of oil conductive channels and analyze the properties of oils. All retirement so as not to interfere with the synthetics and A-98 gasoline. Yes, yes, it is the A-98 on the motor. We are not researchers what kind of AI-98 (let it be 108% isoocotan in the composition, it is good)! Damn with it with a valve in 50 thousand cars selling!
But back to our topic. In the USSR, synthetic oils were produced in excess but they were used only in aviation. On the use of them in the engines of cars could only dream. But the competent people did not dream because it costs it more expensive, but it only needs highly forced engines that were not developed in the USSR (excluding ZMZ-406) and the more not produced, and the synthetic is expensive and the adaptation of the engines to it would require a change of many materials too expensive .
part 2. So the same bad pouring synthetics
1. The engine lubrication system consists of several sequentially parallel channels diameter and length and cross sections of which are accurately designed for a certain viscosity curve depending on the temperatures inherent in these circuits. Each contour is designed for its viscosity at a given temperature. The characteristic of the viscosity of the oil should be so on which the engine is calculated! And synthetics it is much better and this is worse! With ne. proper choice Oil selection oil decreased by its viscosity in one section leads to a decrease in pressure on the other. On the other hand, an increase in viscosity leads to a decrease in the formation (insufficient oil supply) and splashing ability (non-uniform lubricant of cylinders and piston). Thus, the use of a more perfect synthetic oil will lead to the fact that the pressure in the oil pipeline going to the crankshal will decrease because The temperature in this area is relatively low that the synthetic viscosity here will be significantly lower necessary. (What will happen from this yourself after all, we are all smart. Increased engineers engineers, a cunning question? Therefore, it is very important that the characteristic of viscosity in the operating temperature range (70-150 s °) corresponded to the features of the engine and the season of its operation. No box You will not find this characteristic. SAE characteristics are normalized by SAE and GOST 17491? -85 - Oh, I forgot (earlier, each dog knew Verishgin (GOST) - and now they forgotten!) At low temperature 18 s ° and at 100 ° C (viscosity numbers mean viscosity At these temperature - that there is little much).
1.1. Whatever a good promotional oil from synthetics to achieve a high viscosity index to the synthetic basis, high molecular weight polymers are added in prosecutors - thickeners. The structure of the molecules of this advanced substance (polymethacrylate) is a thread. In the hot form of the thread, straightening compensate for the ignition of the oil, and in the cold fold, reducing viscosity. The thickener cannot lubricate anything, and when it is added in significant quantity to get the oil 10w40, lubricating the ability of this oil, worse than that of 20W40 oils. To warn about it in our oils with thickeners, even specially delivering the letter "s" which means "thickener" (more precisely "cautiously - thickener") and not even not even "winter", as many are thinking with W-Winter. Although this item relates not only to the synthetics.
2. Synthetic oil is especially filled after mineral in our burning engines, it may even fall off with pieces - you understand. In addition, the Nagar and the oil helps our engines to plug all the holes (gaps, cracks in gaskets and rubber bands) - "good" synthetic will wash all this - and you yourself understand the use of all holes. And in the Volgovsky 402th in general felt glands! Ay is bad - Sklizko.
3. Our engines are made with letters and require running and permafrost (the engine wakes up not earlier than 20 thousand). Synthetics will not give any advantage, but please see - you know. Question?
4. Synthetic has a high surface activity (SJ via API is still yes and the ASA A3-96 and how) the problem "dissolve" the surface and introduce there its glorious additives (there is nothing to replace with our metal - who constructed it - expensive Yes, and not why he is middle forced - reptile) - again you understand. Question?
4.1. AT modern engines Fluorine rubber seals are generally used to work with the synthetics instead of rubber - otherwise it is impossible. Question?
5. Good oil Poor keeps in big gaps of our CSM. It follows, it thinks that it was not there - stupid (see also paragraph 1).
6. The details of our engines nobody thought to protect against the corrosive properties of synthetics (although in principle it is not bad).
7. Part of the surfaces of old engines is protected by evaporative - condensing principle (witty truth?). But which there may be evaporation from modern oil - after all, the neutralizer (besides ceramic!). You have oil from Mercedes.
8. And in general, it is a variety of oil with such a lubricant. Different particles periodically appearing in our engines (chips, chips, scuffers, surplus) are slipped anywhere and rubbing, reptiles, in the thinnest smoke - they have been climbing everywhere, and here it is too for it!
All listed problems will affect the only thousands of 30-40. Do not believe, well, well, I do not take offense, I cleared my conscience. But from the resource of your synthesized zhiguli, you will spish thousands of 10-20 km. And scold the auto plane for it if you want for it. They "engineer" did not guessed in 1978 that you, in the future, will pour the synthetic.
Part 3. How to choose oils
So the same to deviate horses. This bad question is asked by all reasonable people in Russia. There is no universal answer. Why is a bad question? (Well, why intelligent people are understandable - forever shifted "they all talk about incomprehensible want their scholarship to show"). What do they have there in the West?
And they are all very simple:
1. In any normal country, one hundred is certified and for the fill of the oil (even the best) not certified by the manufacturer of the car in two accounts will fly out of dealers and certified stations of this company. And we do not care about this plant. For example, BMW will turn his head to any dealer for filling non-certified BMW Oil Even in the car 1980 G.V.
2. Car with the design of the 70s in operation is small. Mascate various norms. Some cars over 15 years old are generally prohibited to sell.
3. If the specific type of oil is certified by the manufacturer of vehicles sAE classification quite enough.
And why this question is asked at all, because there are standards and certificates? After all, all competent is to read. Standards practically do not speak about oil suitability to a specific unit. Why? But why:
1. Let's start with temperature viscosity:
1.1. Viscosity characteristics are normalized by SAE (motorworker engineers society (USA)) and GOST 17491.1-85 (looked) at low temperature -18c and + 100 ° C. The viscosity numbers mean viscosity at these temperature - which generally does not mean if not to talk about the banal cold start of the engine for which it is important that the frozen oil does not boil in the pump.
Such temperatures in the engine can be considered and not at all. It is very important, the viscosity dependence curve in the working range of temperatures (70-150s) corresponded to the engine design only then all the main parts of the engine will be lubricated. You will not find any box of this characteristic.
1.2. I already said that good lubricant It does not want to stay in the gaps of our engines. And why in fact, if the viscosity is the same - as one of my opponents would say some kind of.
The fact is that one of the main properties of the oil is the ability to increase its viscosity (and so to say the chain) with the growth of the load - pressure. This is necessary for with large contact loads in the friction nodes, the oil film did not rush and not suppressed out of the rubbing parts. To achieve this effect, special additives are applied, they contain polarized molecules very firmly clinging for the material, the stronger than the more pressure on them, their task is to prevent dry friction.
With the growth of the load in modern oil, the viscosity can grow in dozens and even thousands of times! This is not taken into account by any SAE and any vase. For this parameter modern oils They differ from the oils of 10-year old years of 10 - 100, and in general viscosity, it seems like the same. Here is your grandmother and Yuriev day! And faith after this people and standards.
Fishing in static and temperature viscosities on SAE is just a laughter.
1.3. Petached oil can thicken already at 5-6 and atmospheres means the increase in pressure on this site, which means further pressure growth and so on, and the like.
2.
Quality feature:
The most common API standard (American Oil Institute) - normalizes the level of oil quality (or rather the level of suitability): API classes for gasoline engines: SC - suitable for engines developed and launched in production in 1964-67, SD - 1968-71, SE -72-79. SF - 80-88, SG - 1989-93, SH - 93-95, SJ - 1996-97. The classification is designed for the medium-level engine station from which we always lagged for 3-5 years.
The characteristic is given on the averaged parameters while the breakdown according to one of them may be fatal. So it comes out that, for example, Mobil 1 Rally Formula passed testing - everything is good for a number of indicators exceeds the class SJ but in several - breakdown. Bed? Well no. Until engineers think how to fix them, merchants write on the packaging exceeding SJ and ready - sales is secured.
However, one thing that can be said exactly that the excess of the class is meaningless and the use of much more high-quality oil in the old engine may often be dangerous. For our engines, the Classes of the API SF are appropriate on the risk area. But ZMZ-406 for me for the riddle itself.
3. Standards are quite sufficient if the specific type of oil is certified by the manufacturer of vehicles. So why are this question asked in Russia? Yes, because we have no West and east.
Namely:
1. Because we have a factory that his dealer pours into the car and dealer and one hundred mainly selling what is more expensive - this is a business.
2. We have a certificate for $ 2,000 in cash. Barrels S. shell oils Sent to the guys for certification for several months, no one did not even open them (and the certificate was given a long time)! The story of Mobil has affected - the certificate is still given. What guys in vain humps up. So stood barrels and none of the certificates free Oil with higher quality On the API in Zhiguli did not lie. The certificate is discharged for us - for fools.
But they brought the simplest Velce from Lukil. Well, here and I wonder what the result will be? I come next week and ask about the secret of the expertise's degree. And they could not finish it - the certificates were spread all the oil (three barrels) are now still ordered to finish testing. The result in my opinion is clear - and the class then that Belts was sf. Moreover, the ear guys immediately concluded a contract for controlling products Lukoil sold in the retail network. And as oil on free to buy and Lukoyel pays money.
And ask their journalist whether it is possible to pour the same SHEL into our zhiguli - they are silent smiling mysteriously. Certification is a business, moreover, underground - there is nothing personal - otherwise who will order a certificate if you're buyers then you will scare!
True, the synthetic in the zhiguli pouring anyway will not be advised (colleagues laugh) - they will say expensive why you have had problems (but rarely, rarely). Diplomacy is also a business.
What a seller or a mechanic selling the oil selling you - you know here again, the business (and many do it sincerely from the good heart). They are not enemies to their zhiguli - and our enemies goes the paper give paper.
So in our country the salvation of immersing the cause of the people themselves! Or peep your certificates.
True, this is not about the VAZ judging by his tables they work more - less honest (as far as I can appreciate). But in the VAZ book attached to 2108, I suddenly read and stagned - it turns out to be 5W30 oil turns out to be pouring from -30 to + 35c. I went crazy or they?
I climbed into the real vazov materials (Laboratory of the Laboratory) and what of course I did not go crazy. So who wrote the book? Or the glove came out?
1. Nevertheless, there is no choice. It is necessary to believe the recommendations of the plant but looking at who signed them. For example, GK is unlikely to take the bucks for certification. Does he need?
2. Observe moderation - the extremes are dangerous.
3. Think head. And when you advise you, ask why so? And if the answer you will be, because it is cool, because it is done in Germany, or Mercedes Bens is recommended - then doubt the recommendation.
How and in what cases is the oil change occurs from the semi-synthetic on the synthetics? In the world, motorists often arises one very serious question about whether it is possible to fill oil based on synthetic after using a semi-synthetic lubricant. Often you have to hear the opinion that it is possible to do and nothing fear. But the wrong answer can be ruined the motor and bring to strong unrest, and most importantly, to expensive repairs.
When choosing an oil, you must be guided by the requirements of the manufacturer of the car to the oils used and liquids.
General
The presence in the market of a huge amount of oils creates another trap for inexperienced drivers. It seems to many that the use of certified and high-quality funds certainly cannot lead to any sad consequences. The oil change from the semi-synthetic on the synthetics does not seem step in a dangerous direction. Especially since such a transition is often practiced by motorists and usually does not carry the deposits for the engine.
To choose suitable oilIt is necessary to monitor the market.
But this is a big misconception. Even oils that are produced according to the highest standards can be dangerous for engines in case of incorrect use.
To begin with, when buying a certain brand of car, you need to find out what particular oil is suitable for the acquired vehicle: synthetic or semi-synthetic, which means standard. This is very important because the oil is the second fuel in the system of fuel lubricants. It is consumed, like gasoline, lubricating metal parts and mechanisms. The car can not work without oil, it is necessary to approach his choice no less responsibly than to buy gasoline.
Only after all the characteristics and parameters of the recommended oil are clarified thoroughly, you can move to the question of the possibility of replacing oil liquids from one species to another.
Back to the category
Is it possible to pour the synthetics after the semi-system?
This question is easy to answer. It is necessary to understand the susceptibility of motor aggregates to those or other types of oil. For example, engines operating using mineral lubricant are quite difficult to start at low temperatures due to changes in the viscosity level of the lubricant. These and other properties play an important role in the effect of oil on the workflow of the motor.
Material based on synthetics or semi-synthetics is significantly less exposed to low temperatures. But in this situation, it is not necessary to rush in extremes and use the means that will seem better and more efficient during frosts. It is fraught with big trouble for the car owner and technical malfunction For the vehicle itself.
Mixing synthetics with semi-synthetic should be careful.
Today on automotive market Most of the purchased machines already have some mileage. This means that they have already traveled on a certain fuel and oil. In this case, the instructions will not be indicated, which oil was used in the car engine earlier. Therefore, when buying, you need to learn from the former owner, which specifically the lubricant he used during the operation of the vehicle.
If there is an oil change, in which the semi-synthetic mixes even with the residues of synthetics, it may lead to undesirable consequences. In some cases, it is contraindicated to apply synthetic material as a motor oil, because it has a very large fluidity. For example, if there are seals and seals among metal structures, synthetics will begin to join them into a chemical reaction, thereby destroying them.
Often, all arguments are reduced to the fact that it is impossible to change semi-synthetic on the synthetics or should do it with mandatory flushing Engine. In fact, change the lubricant on an increasing engine without washing the engine. This means that at first it is necessary to use a mineral agent, then semi-synthetic and only then synthetics. This order will lock the mechanism of the car.
Summing up the interim outcome, you can make two outputs:
- Replacing semi-synthetic on the synthetics of one brand as a whole is safe and does not require washing the motor.
- The replacement of synthetics on semi-synthetic can be produced, but it is necessary to wash the engine.
However, these findings are not always true. It is worth noting that in domestic cars there are its own specifics: they work well on the semi-synthetic lubricant, but they do not react poorly or do not tolerate synthetic products at all. Such a reaction to the synthetics has domestic brands: UAZ and gas. Therefore, in the models of these grades, no grant of semi-synthetic on the synthetics is made.
In other cases, the replacement of semi-synthetics on the synthetics is quite relevant and safe, does not require washing the motor. Moreover, according to experienced motorists, the washing of the engine after using the semi-synthetic material and the transition to synthetic will deprive the engine of some useful properties.
It turns out that the optical density of the used synthetic oil will be noticeably less, if the motor apparatus washed earlier.
If we process with flushing materials each time before the upcoming replacement of the oil member, this leads to a longer preservation in the internals of a fresh oil motor.
At first it seems that this is good, but at the same time countering oxidative processes decreases.
Washing engine is needed in cases where:
- The brand of lubricant is changing.
- The level of viscosity changes.
- When the transition from synthetics is made on semi-synthetic.
- When there are doubts as an oil material in the engine or in the oil fell poor-quality fuel.
- After any repair of the engine, which was carried out with the opening of the motor.
- When the driver had doubts that the former owner regularly changed the engine oil.
Without flushing, about 10% of the semi-synthetic material remain in the engine, but they do not play any negative role. Synthetic material does not experience problems in the presence of another element.
Among the motorists around the world have not been afraid of disputes about whether there are compatibility from engine oil from different manufacturers. Also argue about whether lubricant can be mixed, made on the basis of various base fluids. Questions are really difficult. A lot depends on the specific composition of each of the mixed motor oils. Let's try to figure out what actions can be performed, and which - it is extremely undesirable to do.
Why motorists mix oil compositions
If the car has just purchased, the problems of its owner, as a rule, does not occur. Oil change is made according to planned graphics; W. official dealer In stock The oil makeup that engine is needed. Therefore, happy owners of new cars can not be worried. So continues until the end of the warranty period or mileage.
By the end of the warranty period (from 2 to 4 years, without limiting the run), the car in many cases runs up to 100 thousand kilometers. If this happens, the question of the transition to another high-temperature viscosity of the oil. For example, before that, the oil composition was poured with a viscosity of 5W-30. Now it is advisable to switch to another indicator - for example, 5W-40 or 10W-40 (if such a viscosity is provided by the car manufacturer in the technical documentation).
No matter how the engine was washed and the spent lubricant merge, it will still be up to 0.5 liters of old oil composition. This will add here washing fluidwhich adversely affects the engine parts with a long stay in the motor. So, I want or not, but mixing the old spent composition with new oil will occur.
Another situation is the drop in the oil level to critical. Causes can be different - a large waste, if the oil composition is poor-quality, or flow in the lubrication system. Be that as it may, it will be necessary to add oil fluid, but there is nothing at hand, except for lubricating other viscosity and another manufacturer. Here is another reason why drivers sometimes go to the forced mixing of motor oils.
What lubricants today use
Any of motor oils used today consists of two components: base composition and additive package. They are designed to provide antifriction, detergents, antioxidant, anti-corrosion, dispersing, viscous, as well as other properties of lubricating compositions in a wide range of temperatures. From negative in the cold engine to high in cylindro- piston group Working motor.
If in frosty weather will be launched cold Engine, the oil must have enough fluidity to quickly get through the channels to vital important nodes and motor details. Otherwise, he will start working dry, which is fraught strong wear. The thickening of the poor-quality lubricant, even in a small frost, is able to kill the engine in one winter.
At the temperatures of the working motor (150 to 200 ° C), it should not be too liquid, since it is obliged to form a sufficiently stable oil film between rubbing surfaces. Otherwise, it will rush and the details will again work dry. According to the basic composition oil fluids divided into four types:
- mineral;
- semi-synthetic;
- hydrocracking;
- synthetics.
According to the classification of the American Institute of Oil, all basic formulations are divided into 5 groups.
The semi-synthetic is obtained if adding synthetics to the mineral base after hydroprocessing. In most cases, the ratio is 70% to 30%.
Lubricants from different manufacturers
If you mix semi-synthetic or synthetics from different manufacturers, then they will certainly differ by packages of additives, even if the synthetic component is the same - based on PJSC.
Judging by the above, these packages are quite complex in their composition. Each manufacturer is additives are the know-how, which is advantageously distinguishes its products from competitors. If you interfere with the compositions from different manufacturers on the same basic basis, there is no guarantee that their additives will not conflict. At least, you can get a general deterioration in the qualitative indicators of such a "cocktail".
Synthetic compositions of different brands can be mixed only when they have the same tolerances on the American API standard or European ACEA. Lubricating compositions, having different indicators, can be intended for different types engines, in this case, their mixture is undesirable.
For instance, aPI class SL is intended for motors released from 2000 to 2004. The SM API applies to engines released since 2004 release, and the SN class is designed for modern motors. These are already oil compositions of Low SAPS with a minimum content of sulphate ash, phosphorus and sulfur for compatibility with modern systems Neutralization exhaust gases And better energy saving.
Lubricant from one manufacturer
If we interfere with oil from one production brand - for example, synthetics with synthetic of different viscosity - Here the picture is completely different. As a rule, this can be done, because in the specified case, the manufacturer makes mixing of the main composition with the same additive packages. Different only viscosity. This may mean that viscosity modifiers are added somewhat in another proportion.
On such a mixture you can safely ride the next change of oil composition, without fear of any conflicts of additive packages. Just a common viscosity will shift. For example, if you interfere with 5W-30 from 10W-40, it turns out a non-standard value of 8W-35. On the yield, it will not be strongly affected, the oil will be in the running motor a little albeit. The low-temperature viscosity threshold will also become slightly higher.
A mixture of semi-synthetic and synthetic lubrication
If the synthetic lubricant contains additives compatible with its basis, then the semi-synthetic product somewhere 70% contains a mineral component. This suggests that the additive packages can be different, even if the oil liquids of the same brand. On this basis, it can be argued that mixing of such oils is a risky procedure. On such a mixture, it is not worth riding for a long time, especially if the motor fluids of different brands.
Additives can conflict with each other. For example, the mineral base needs a relatively large number of stabilizing viscosity modifiers, since its base composition has a small viscosity index. And in the synthetics, this indicator provides the basic base itself, it does not need viscosity modifiers in such quantities.
The additives depressants that reduce the fluidity loss temperature are also not needed to synthetic composition in large quantities, unlike mineral. So what will happen? The mixture of these oils will receive an increased high-temperature viscosity due to additives to the mineral component. It will not lead to anything good, because the fluidity of the mixture will decrease, and its access to engine parts may be difficult.
The best option is added to the semi-synthetic synthetic oil. Such a mixture can be done, especially if oil liquids are one brand. Synthetic, as better, will not particularly change the viscosity parameters, especially since it is usually more fluid.
findings
To interfere with oils of different manufacturers, even if they have similar basic formulations, it should be very careful and to do it only in the most extreme cases when there is no other way out, for example, you need to get home or to the nearest one hundred. If such a situation arose and it is necessary to add oil from another manufacturer to the main composition, it should be easily eliminated from such a mixture, since it is quite possible to check the engine due to the additive conflict. You can wash the engine after that and fill suitable lubricant. After that, driving somewhere 5 thousand kilometers, make another replacement to finally get rid of the remains of that mix that was in the motor.
Often the emerging issue of motorists: can you fill with the synthetic after the semi-system? Today's number and variety of oils on the market can be very confused and bring down in an inexperienced person. At the initial stage, you at least need to find out which oil is recommended by the manufacturer of your car. In general, there are several types of oils: synthetics, semi-synthetic and mineral. It is worth noting that these types of oils are not amenable to standard price gradations, since mineral (i.e. natural) has the most low cost, and chemical oils are more expensive. Oil on a par with fuel is the main consumable material Engine, it produces lubrication of all parts. The oil should be operated in a very wide range of temperatures, but when this parameter changes, density and viscosity changes very much. You can hear such stories from drivers that strong frost The starter barely turns the crankshaft. Why not pour the synthetics? Can you fill with the synthetic after the semi-synthetic? It is worth noting that the motors with mineral oil at a colder time of the year have a very difficult start due to a strong change in the viscosity of the oil. Synthetic I. semi-synthetic oils Less are less susceptible to change in temperature. But throw in extremes, i.e. Immediately pour oil with the most high characteristics The fluidity and less susceptible to the temperature change is not worth it. It is also noted that in some foreign cars, simply through a specific design to the engine can not be flooded with oil of synthetic origin. This happens with some domestic carsFor example, gas and UAZ are not predisposed to the use of synthetics. In this regard, all types of oils are essential depending on the situation or car. You can add that each oil is to share another 3 species: for summer and winter period, all-season. Naturally, most car owners do not bother and buying all-season oil. Replacing semi-synthetic oil replacement in the order of mineral-semi-synthetic synthetics occurs without washing the engine. When changing the oil in reverse order You need to wash the motor. Washing oils are designed to clean the dirt and the complete removal of the spent oil. The remnants of washing oil in the engine of about 10% do not lead to changes and deterioration in engine performance. Pouring of synthetic oil without flushing after semi-synthetic leads to improved engine performance. However, such a parameter as an optical oil density, it turns out less if flushing is flushing. On this occasion, repeated studies were conducted, which made it possible to conclude that the synthetics works uniquely better if the engine does not wash after semi-synthetics. If you still carry out processing washing oils Before each replacement (even synthetics on the synthetics), this leads to a long preservation of a more "fresh" lubricant, but the oxidative properties will become lower. This is how the process of replacing lubricants looks like. In this article, we considered a topic in detail: you can fill over the synthetic after the semi-system? Now, when replacing oil, you will not have a question or you can not pour this or that lubricant.
What happens if you add semi-synthetic motor oil to synthetic? This question arises from most motorists. We immediately note that the plot can only be done in emergency situations, for example, in the middle of the route, if the oil level fell, and there is no suitable mixture. It is not necessary to abuse the specified procedure, you can get a wind overhaul over time. Before plot, pay attention to the difference in the automotive parameters specified in our article.
Motor mixtures consist of a basic base and additives added to it. The base affects the properties of the oil, and the additives helps to highlight certain characteristics. motor fluid, for example, anti-corrosion or detergent properties.
The basis of the car consists of molecules of a certain structure and sizes. Than a homogeneous molecule, best characteristics It has a liquid. Synthetic mixtures are manufactured using the synthesis of hydrocarbon compounds. Their structure is represented in the form of long chains of carbon atoms, the same form - this ensures the stability of synthetic to changes in its structure with various temperature regimes and large loads.
Figure 1. Mineral oil.
The semi-synthetic is manufactured by mixing synthetic and mineral water in certain proportions. Mineral molecules are different in shape, therefore the semi-synthetic liquids have various molecules in their structure - this reduces the range of their operating temperatures.
Figure 2. Synthetic oil. Figures 1 and 2 shows the molecular imitation of the molecular structure of synthetic and mineral Oil respectively. It is not difficult to determine where the density is better and more slipping.
Obviously, mixing the semi-synthetic to the synthetics, you worsen the properties of the engine fluid. To learn more about the basic basis, you can, from the video:
Mixes with different viscosity
A very important parameter for the car is viscosity (fluidity), which affects the change in the structure of the engine mixture at various temperature modes. Before mixing semi-synthetics with synthetics, pay attention to the marking indicating the viscosity of the engine fluid. For example, the inscription SAE 10W-40, indicates the all-season fluid, mixing it, for example, from 5W-20, you will receive engine oil with an average viscosity value, its characteristics will be approximated to that by car, which is more flooded in the motor. At the same time, consider that 10W-40 is much thicker than 5W-20, the resulting mixture will be faster at high temperatures, it can lead to formation is not sufficiently dense protective film In the friction nodes of parts and motor wear. Take such oil is not recommended for a long time. Since with an increase in the mileage of its properties will deteriorate, it will not be able to protect the engine from wear.
If you have a higher viscosity in the car and reduce the fluidity of the mixture to a critical value - the liquid will be very thick and cannot penetrate the friction units, the motor will work with dry friction parts.
Reducing the low-temperature motor mixture, consider: This parameter affects the engine launch without warming up, warming up force aggregateYou reduce the resource of the engine fluid, it must be replaced earlier than the regulated run by the manufacturer of the machine.
It is absolutely not permissible to apply a plot of semi-synthetic for a new motor with a flooded energy-saving synthetics, this will lead to the formation of a nagar on the piston group at high temperatures, plus the semi-synthetic will prevent the friction reduction between the drive elements, the motor can not be used at maximum power.
Different manufacturers
Different manufacturers are used as additives various substances, with a mixture of two or more brands there may be unexpected chemical reactions between the compositions of oils, this will lead to such consequences:
- the formation of a large number of deposits;
- premature aging of motor fluids;
- increase in nagar;
- reducing anti-corrosion, antioxidant properties of liquids.
All this will negatively affect the resource of the engine.
Experts recommend mixing motor mixtures with different basic bases of only one manufacturer. Availability of labeling on a canister of compliance with API and ACEA specification, different brands do not protect your motor from the possibility of oil entry into aggressive interaction. No one gives you guarantees that patented products by two trademarks will interact with each other, not the worst viscosity-temperature characteristics of the liquids. Plus, you could purchase a non-certified car, in such a situation, to say which quality of fluid in the canister will be impossible after mixing.
The most risky option is considered to topping the semi-synthetic engine oil to synthetic various brands. How to behave fluids with increasing load and operating temperature Unknown.
Take into account that many manufacturers wanting to make their products more accessible to buyers produce hydrocracking oils as completely synthetic. Hydrocracking products are obtained from the mineral base, it is non-critical mixing with semi-synthetic. Synthetic, obtained from PJSC or Esters, is mixed with semi-synthetic.
Let's summarize
Semi-synthetic can be addressed to synthetic oil in emergency situations, and it is necessary to consider:
- Adding to the composition of the oil of another engine mixture can improve its properties and worsen others.
- The viscosity of the liquid obtained during mixing should not reach the critical value. Too thick or liquid mixtures lead to dry friction of motor parts.
- Packages of additives of different trading brands Autoshel may be incompatible with each other, so it is better to top up the oil of the same manufacturer.
- You can mix synthetics with semi-synthetic one brand with the same viscosity without tangible damage to the drive.
It is unacceptable to ride a long time on the "cocktail" from the car - the properties of liquids with an increase in the mileage will deteriorate. Therefore, as quickly as possible, replace the engine oil.
