If you are engaged in the maintenance of your car yourself, then at least once in life asked if you can mix engine oils different manufacturers? It is impossible to answer the question uniquely - after all, each lubricant has a unique composition and properties, divided by viscosity classes, groups and production technologies. And before experimenting on the engine of the vehicle, it is necessary to understand the features of the used motor oils.

• Causes of mixing fuel

  And why, in fact, at motorists there is a question about whether motor oils can be mixed with different manufacturers and composition? We will analyze the main reasons:

  Mix of different oils

  • In order to save. The relevance of this issue occurs when after the past maintenance The canister remains a small balance of engine oil; At the same time, the motorist wants to change the liquid used to the new one. The connection of the two oil base will save most "New" fuel.
  • In emergency cases. Loaded all the oil on the go? It is forbidden to move without it: the motor will quickly overheat and starts to divert from the inside lightning. To prevent negative consequences, you need to pour at least some oil under the hood to get to the nearest station. If at hand, only one type of plot material, and the nearest auto shop is located in a hundred miles from you, temporarily mix different engine oils permissible.
  • When moving from one lubricant to another. No matter how you rinsed the engine, a small part of the old engine oil will remain inside it (approximately half liters). Therefore, pouring a new lubricant into the car be sure, it will in any case will contact with the remnants of the past. But such a situation will not lead to serious consequences - the high proportion of fresh oil is simply "muffled" the reaction inside the working zone.

  Effects

  At first glance it may seem that all motor lubricants are compatible with each other, because the main objective of manufacturers lies in the protection of the motor from temperature differences and premature wear. Nevertheless, their composition and ability have significant differences, which determines the impossibility of innocuous interaction of some ingredients. It is time to talk about what consequences can bring mixesters of different engine oils.

  "Confrontation" of additives

  

  When you pour into the engine oil of another brand, additives are mixed. Additives are the chemical compounds used to clean the engine compartment from dust and soot and contributing to the increase in the anti-corrosion stability of the inner surface of its working area. From what is the additive and how they interact with each other are given to understand only the engineers of the manufacturer: the formulas of all ingredients are kept in the strictest secrecy. In the most negative defold, the interaction of different chemical elements will lead to a rapid corrosion of the metal, the destruction of sealing elements, excessive consumption of fuel and lubricants or clocking mechanisms with the subsequent stop of the power unit.

  Mixing of various chemical bases

  The chemical bases of any engine lubricant may be the following types:

  1. mineral - fully consist of natural petroleum products. Service life in moderate driving mode - 4-5 thousand km of run;
  2. a semi-synthetic - by 60-70% consist of natural and 30-40% of artificial ingredients. Development period - 7-8 thousand km of run;
  3. synthetic - have a completely unhetatic chemical basis. Service life - 10-15 thousand km of run.

  

  Stripping from this information, it is easy to understand that the mixing of synthetic and mineral oils is impossible: both fluids will exist autonomously from each other, which will lead to the "split personality" of the motor. The inner surface of the engine will first be enveloped by natural petroleum products, and then wash off with artificial analogues. Under the influence of the oil pump, this process will be repeated with a frightening frequency, disturbing the integrity of the protective film and exposing work units to high-temperature overloads. By the way, some of the chemical compounds in the interaction of mineral water and synthetics will fall out. What is the result? An increase in interdiscose gaps, extruding the sealing elements, the destruction of pistons and overhaul Motor. Naturally, this situation can only be formed after a long interaction of two completely different liquids. The short-term use of a mixed composition can only lead to regular overheating of the motor and the failure of the filter elements.

  Contrary to expectations from self-mixing of natural and artificial foundations, semi-synthetic engine oil will not work: the formation of semi-synthetic is possible only at special installations, and not inside the engine compartment.
  

  Is it possible to mix different viscosity oils?

  

  It makes sense to talk about the compatibility of summer and winter engine oils - even beginners in the automotive business that this "tandem" does not lead liquid to universality. And the reason for this is different viscosity properties. If summer lubricants have a thicker consistency, then winter, on the contrary, have an overly liquid base. Mixing will reduce the frosty and high-temperature stability of the composition and will disturb the stability of the protective film.

  Universal car lubricants You can prevent only if they have small discrepancies in marking, for example, 5W30 and 5W40. However, keep in mind: the combination of such viscosity will reduce the high-temperature threshold of oil.

  Oils of different manufacturers

  Ideally, fostering the manufacturer's oil, which is already flooded into the engine. For example, if you use technical fluid Shell, then add the hood to the hood. Products of this brand are recommended. Such a measure contributes to the most favorable mixing of the workforce and achieving the most effective circulation inside the working area. If you do not comply with this rule, you can stay without a means of movement.
  

  What automobile engine oils can be mixed?

  To reduce the likelihood of the appearance of unwanted consequences for a car, when choosing (if provided), the liquid for the topping must be paid to:

  

  • Quality class and viscosity. For power plant It is necessary to choose only those fluids that comply with the required automakers of international tolerances and specifications. Therefore, diluting the previously sprinkled lubricant, be sure to check the characteristics of the products used. Only identical indicators can positively affect the power and operational propertiesah motor.
  • Approval of automakers. If you want a car to serve for more than one year, then under the hood, only the oil that meets the requirements of the leadership to the vehicle.
  • Technological features of mixtures. If its patented technology is used in engine oil, then when mixed with another brand, the probability of formation inside the homogeneous lubrication system is reduced. The unique adaptive properties of one oil can be lost in the case of foreign elements in its composition. In this case, it is useless to expect from a protective film of high performance. To reduce the risk of "conflict" inside the power unit, choose engine oils produced by standard technologies.
  • Type of chemical base and oil composition. If you are a chemist on education, then having studied labels of both oil fluids, I will define without any problems - whether they can interact effectively with each other. If you have a "crust" of an accountant, a manager or other professional, not related to a chemical and biological profile, then experiments should not be put on the car. Preparing how two absolutely different substances will be behaved. When choosing a plot oil should also be kept the chemical basis. To interfere with mineral water with synthetics meaningless: they will live apart separate life from each other.

  

  The selection of diluating oil is a complex and scrupulous occupation. Even if you consider all the above nuances, pre-predict in advance how the motor will be reacts to such a procedure. Maybe the car can be "happily" the resulting mixture can begin to squeeze it from all available sealing materials, and maybe it will start instantly burning the consumable fluid, with a blue-gray atmosphere exhaust gas. In order not to harm the motor system, it is recommended to avoid a similar measure.

  In cases of breakdowns on long-distance trails or outside settlements (when there is no possibility to choose the required car lubricant) mixing engine oils of different properties, manufacturers and composition is allowed, provided that motor compartment It will be washed from this mixture at the nearest service center. Otherwise, you risk staying without a means of movement.

  Is it worth interfered?

  As mentioned earlier, to definitely answer the question "Can I mix motor oils", it is impossible. It all depends on the properties, parameters and manufacturers of liquids. "Garage" masters often assure that the terrible consequences may not happen from this procedure - after all, the oil is even visually different? But what if the selected composition gives a reaction to contribute to the formation of corrosion and excessive amounts of Nagar? Who will suffer responsibility for the ruled engine? Automakers, by the way, do not express any prohibitions about this - they all comes down to the recommendations for the choice of lubricant, placed in the manual to the car. Posted in oil with the desired classification? Excellent, it means that it is possible to pour it under the hood. Everything else depends on the owner itself.

  It turns out that documents officially prohibiting the mixing of motor fuel, in principle, it does not exist. There are only prescriptions manufacturers. However, this does not mean that motorists must constantly interfere with motor oils. It is advisable only in cases of extreme necessity. Or if it allows the manufacturer oil basics. Compatibility of motor oils with other fuel and lubricants in some cases is indicated on product labels. For example, practically on all lubricants of the company Liqui Moly. There is information on the admissibility of mixing liquids with analogs.
  

Among the drivers there are many opinions about whether motor oil can be mixed and how it can affect the engine. Some are extremely categorically referred to such an undertaking, insisting on the indispensability of the Motor washing stage, others, on the contrary, do not see anything cleaned in "Mixes" and provide their own argument.

Mixing engine oils is theoretically allowed

It is obvious that this question requires clarification with the mandatory emphasis on the firm base of evidence.

Can Mix Motor Oils

Let's start with the fact that the answer to the main question will be positive, but with the reservation. Yes, the mixing of motor oils is theoretically allowed. To make sure this and forever make sure this, pay attention to the existence of semi-synthetic engine oils. After all, if mineral oil is an organic agent, and "synthetics" - completely artificial chemicals, then "semi-synthetic" - nothing but their simple symbiosis.

True, in the absence of a direct ban on mixing oils, it is still not worth abuse.

Video tracking about the admissibility of motor oil mixing

How to combine oils of different viscosity

If my mineral oil is in the engine, it can be mixed with semi-synthetic brands, as well as oils that are hydrocracking products. Similarly, the combination of "mineral water" with synthetic oil made on the basis of polyalphaolefins (PJSC) is allowed.

As for other species of "synthetics", such as polyester, glycolic or silicone, then such oil pouring into mineral is not allowed in all cases, it matters the formula of a particular synthetic oil. This time must be specified from the official representative. car brand., under the name of which your car was released.

It is also possible to add mineral oils in "Synthetic", "semi-synthetic", which is relevant for cases of a sharp decrease in the oil level on the dipstice and in the absence of the necessary canister.

With which you can mix synthetic oils

Most of the modern brands of synthetic engine oils have admission to API standards (USA) and ACEA (Europe). The requirements of these standards provide that the oil produced must have the ability to complete mixing with any other brand certified as part of API or ACEA, engine oil. At the same time, there should be no dangerous for the parts of the engine of chemical reactions, leading to the fallout of the sediment, foaming, etc.

This means that if you have a "synthetics" motor with API certification or ACEA, then in an emergency you can, not worrying, add any other oil from the certified manufacturer. You can reach this mixture to a hundred to eliminate the breakdown and replace the oil at the manufacturer recommended by the manufacturer.

What will happen if mixed "semi-synthetic" with "synthetics"

You can mix synthetic oil 5W40 with semi-synthetic 10w40

When urgently need to add synthetic oil, for example, you encountered a drop in the level of the working fluid somewhere in the field, and in the trunk there is only an incomplete canister with "semi-synthetic", then you should not be upset.

You can mix, say, synthetic oil 5w40 with a semi-synthetic 10w40 and at the output to obtain a workable mixture with a viscosity of 6W40 or 8W40 (depending on the ratio of oils). But most the best optionallowing you to ride before planned shift of engine oil, there will be a higher quality lubricant. For example, to "semi-synthetic" 10W40, you can add synthetic oil 5W40.

Motor oils from one manufacturer

Products of one brand various levels, as a rule, in many ways similar, having more common elements

Many experts adhere to opinions that it is better to add to the engine not quite suitable oil on viscosity, if only it was from the same manufacturer as the main, already filled into the engine. And, despite the unification mentioned above, the API or ACEA standards, in these conclusions there is a rational grain.

The fact is that within one brand products of various levels, as a rule, are largely similar, having more common elements than distinctive. This means that the base of the oil is one and the composition of the additives are also not different. You can almost guarantee the lack of conflict additives when mixing.

In addition, oil from one company can be mixed in any proportions. It is also necessary to draw attention to the fact that one plant manufacturer can produce the same oil under various brands.

When moving from one viscosity to another, it is better to use the oil of one brand

With the usual replacement of engine oil in the engine there are about 5-10% of the old composition

Not everyone is thinking about it, but even with the usual replacement of engine oil in the engine, there are about 5-10% of the old composition. Although it is not much, yet it makes sense to secure the details of the motor from a possible conflict of additives. To do this, use only one brand oil.

Particularly actually adhere to this rule In the case of transition from one viscosity to another. Ideally, if you had a "semi-synthetic" of the company "X", then the "synthetic", which you decide to go, should be the same brand.

Is it possible to combine motor oils from different manufacturers

Very risk mixing engine oils from different manufacturers

The most risky option is temporarily allowed - mixing motor oils from different manufacturers. It's all about additives, the composition of which each corporation is different and protected by patents. Of course, this does not mean that when the oil interacts, everything will be foaming, and then falls into the sediment.

Moreover, many drivers do not allow such a likelihood at all and pour what they advise them, often give preference to the new manufacturer. I must say that in practice cases of incorrect reaction between motor oils different marks It is extremely rare, although the chemical interaction between their components is inevitable.

No one in this case will be able to guarantee that old and added oils will work as one whole, and not destroy a certain part of the beneficial properties of each other.

Mixing Oceelles Shell Brand (Shell)

At one time, journalists "driving" decided to find out how the engine oil behaves to behave themselves in the case of mixing it in various proportions with another similar product. As a result, several popular goods were selected, among which, in particular, the oil of the Shell brand was present.

As a result of laboratory testing, it was found that when the shell lubricating material was added to the chemical composition of even a small amount of engine oil from other manufacturers, certain chemical reactions occur. But ultimately, such metamorphoses did not bring any negative changes.

Official prohibitions for mixing working fluids directly from producers of petroleum products also never received. Companies are usually limited only to recommendations on how oil is desirable to use for specific operating conditions.

At the same time, none of the brands will never openly declare that its oil can safely interfere with the liquids of other brands, as it is not profitable for him. That is, Shell always recommends to add only "Shell", and Mobile, in turn, will in every way will assure a motorist in the need to comply with loyalty to the only brand - Mobil. These are the laws of commerce.

The combination of oils 5W30 and 5W40 - what we have in the dry residue

When mixing engine oils can slightly drop a high-temperature viscosity coefficient

And now a visual example of probable mixing. Suppose you have discovered a significant deviation of the engine oil level in your engine. When a hike in the store it turns out that the 5W40 synthetics brand is temporarily absent or there is a suitable marking, but the oil itself goes under a different brand.

In this case, there is nothing terrible to add in the engine synthetic oil of the 5W30 brand. Of course, if it means a significant topping of the oil, then as a result, the viscosity will change somewhat. But this is not quite critical. In case of use all-season oil 5w30 or 5w40 The temperature of the trouble-free start of the cold engine is at -35 ºC.

The difference consists only that when mixed, a high-temperature viscosity coefficient will slightly drop (the number after the letter "W"), which matters with extremely high temperatures operation.

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The ideal is the situation when the car rises the entire operating period on the oil of one manufacturer. In reality, it is impossible to achieve such an effect, different trademarks are produced by new productsIt is sometimes difficult to find the oil that you used, or the price for it becomes too high. In general, the reasons for which there is a need to pour other engine oil set. Let's try to figure out what can lead to, topping the oil of another brand into the engine.

We clarify immediately: to add without tangible damage to the motor and changes in the characteristics of the flooded motor mixture you can up to 10% of the liquid from the total volume. Topping large volumes, it is worth thinking about the interaction of oils. We will not consider the possibility of mixing different bases, for example, synthetics and semi-synthetics, in this article we are talking about taking the oil of another brand into the engine if the marking on SAE and the base base are the same (oils are identical at first glance). In this example, we bring arguments that exclude the possibility of taking the oil to the other brand, so we consider mixing different oils from different Base And there is no point in viscosity.

For the production of cars, different basic foundations are used to which certain additives are added. Experienced drivers believe that it is absolutely harmless to the motor to top up a mixture of another brand with a similar base. Such a point of view is quite substantiated, but it can be questioned for two reasons:

1. The basic base of various trademarks is made from different raw materials with the use of certain processing technology.
2. Trading stamps of cars apply different additives on the chemical composition.

Basic oil can be synthetic, semi-synthetic and mineral. Synthetic mixtures are obtained by synthesis hydrocarbon compounds. They are most resistant to change the temperature regime. Their composition can be very different due to the possibility of synthesizing a variety of compounds. The basis of such engine fluids can be:

• polyalphaolefins (PJSC);
• esters;
• polyorganosiloxanes;
• glycole compounds.

Depending on the basic foundation, additives are selected that will interact with it, providing protection for the power unit. Mixing different synthetic bases is permissible if not to take into account the additives in them, plus the formula of the recycled oil should be the same. The compliance of these conditions is possible only if the oils of one manufacturer, a mixture of another brand, could be obtained from raw materials, characteristic, plus the scheme of its processing could be different. Therefore, in the liquid of another manufacturer, even if you mix two synthetics, there may be a different chemical composition that does not lead to the interaction of motor mixtures. Some quality of oils can improve as a result of the topping motor fluid another brand, and others on the contrary. How the mixing product will behave at high temperatures it is impossible to predict.

Another nuance makes you think about the possibility of mixing the synthetic foundations of various brands - there are manufacturers that hydrocracking products are issued for clean synthetics. According to the viscosity-temperature parameters, synthetic and hydrocracking oils are not distinguished by their difference in the processing scheme. Hydrocracking mixtures are obtained in the process of recycling the mineral base. For synthetic liquids, one additives are used, and other chemical elements included with the composition of additives require the features of hydrocracking products. The topping of hydrocracking oil to the synthetic will worsen the properties of the engine fluid.

Mineral can be obtained by distillation of oil, there are several degrees of cleaning it from oil fractions, therefore, the mineral water producers may differ in the composition.

The semi-synthetic is created by mixing a certain amount of synthetic base with mineral base. The ratio of mixing products may be different (it is not regulated). If we take into account that synthetics, may have different origins, and mineral water different brands differs depending on the use of the degree of cleaning, then what product you will receive, if you pour the semi-synthetic one of the brand to another to predict, because it will answer whether it will cope with protective functions of the power unit from wear.

An illustration on the topic of mixing motor oils of different brands can be viewed on the video:

What are the additives used?

Machine manufacturers argue that their products are unique due to blewing additives used. They develop the chemical composition of motor mixtures, which is patented. An ordinary buyer is unknown, which additives (their proportions) were used, but it is quite clear that different trademarks they differ in high-quality and quantitative composition. By taking the decision to add a motor mixture of one brand to another, be prepared for the fact that the additives used in them will enter into chemical reactions that will accelerate with increasing temperature. The consequence of this can be:

• nagar formation on drive elements;
• rapid aging of motor fluid;
• foaming oil;
• slashing of the power unit;
• an increase in viscosity;
• the appearance of the knock in the drive and so on.

Deciding to pour different brands of motor oils into one motor, consider that the use of additives up to 30% of the total volume is allowed. At the same time, poured mixtures with the same base and viscosity, different brands, you can change the qualitative composition of additives. When reacting, they can form new chemical compounds, it will lead to an increase or decrease in the viscosity of the engine mixture. The viscosity affects the protection of the power unit from overheating at high temperatures, the formation of a protective film, which reduces the friction and wear of the engine elements. Also, this parameter affects the start of the engine without warming up. Incorrectly selected viscosity reduces the motor resource.

Also additives, with improperly, their ratio in oil can lead to an increase in Nagara, precipitation drops. An increase in detergent additives is capable of provoking the engine channels and lubrication systems.

Last argument

Machine manufacturers, knowing the various chemical compositions of motor mixtures trying to reinsurance themselves, developed tolerances. Car giant plants are testing various types of motors and lubricants, the testing of the testing is evidenced by the presence of appropriate tolerances on the oil can. Based on this, it is impossible to pour oils of different brands into the motor. Pay attention to the tolerances if the previous arguments are unconvincing: not the entire synthetic on which a certain viscosity is indicated and the Marking on API and ACEA is suitable for all types of engines, it follows from this that the liquid of one brand cannot be addressed to another oil that distinguishes the brand . Unless, of course, we are not talking about force majeure when the level of engine fluid fell, and there is no corresponding oil for the topping. In such a situation, you can add the oil of another manufacturer in force aggregate (It is preferable to at least some lubricant than the dry friction of the drive details) to reach a hundred or garage and replace the engine fluid.

Change, reaching the destination, "cocktail" from the car to another oil recommended by the dealer of your car, because it is not known how the mixing product of two or several brands will behave after several thousand kilometers.

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Is it possible to mix different engine oils - viscosity, firms

The question of the possibility of mixing engine oils constantly worries drivers, especially if the level falls sharply because of the leakage, and to the nearest corporate store or the service still go and go.

In different literature, you can find a lot of information about mixing engine oils, and there is no such thoughts about this: some say that it is possible, others cannot be. Let's try to figure it out on your own.

As you know, motor oils for cars are divided into a variety of features:

• basic base - "mineral water", synthetic, semi-synthetic;
• the degree of viscosity (SAE) is notation from 0W-60 to 15W-40;
• aPI classifications, ACEA, ILSAC - for what type of engines is intended - gasoline, diesel, four- or twin, commercial, cargo, passenger and so on.

Theoretically, any new oil that appears on the market passes a number of tests for compatibility with other oils. To obtain certificates for different classifications, the oil should not contain additives and additives that will conflict with additives and the basic base of some specific "reference" species of oil. It is also checked as far as the components of the lubricant "Friendly" to the elements of the engine - metal, rubber and metal tubes, and so on.

That is, in theory, if oils from different manufacturers, such as Castrol and Mobil, belong to one class - synthetics, semi-synthetic, have the same viscosity degree - 5W-30 or 10W-40, and are designed for one type of engines, then you can mix them .

But it is advisable to do only in emergency cases when it was detected to flow, the oil quickly follows, and it is impossible to buy "native oil" anywhere else.

If you have conducted such a replacement, you need to quickly get to the service and then wash the engine to completely clean all the nodes from the slag, scale and gary and pour oil from one manufacturer. Also, while you are going with such a "cocktail" in the engine, you need to choose a sparing ride mode, do not overload the engine.

Thus, mixing oils of different brands with the same characteristics is allowed, but only in order not to expose the engine to even greater problems that may occur when the level falls.

It is quite another thing when it comes to mixing "mineral water" and synthetics or semi-synthetics. It is categorically prohibited and not recommended even in emergency situations.

The chemical composition of oils of different classes is absolutely unequal. In addition, their composition includes additives that conflict among themselves and can occur coaling, coking piston rings, Bringing tubes with various sediment sediments. In a word, you can handle the engine very easily.

In conclusion, one can say one thing - in order to do not experience in your own skin, what makes mixing different species Motor oils, buy them always in the future and take just in case a liter or five-liter canister in the trunk.

The opinions of drivers are diverged in the question: is it possible to mix engine oils with different characteristics, whether it will affect the engine. Someone categorically denies such an initiative, believing that nothing good will come out. After all, the stage of the washing of the motor will be excluded. Someone, on the contrary, assures that there is nothing bad in such "mixes". Both of these parties provide their arguments. It is possible to mix oils, but it is necessary to do that, complying with certain rules. Otherwise, you can apply a serious damage by a motor that will require costly repairs.

Mixing oils is permissible, but it should be done extremely careful

As mentioned above, mixing engine oils may be, but there are certain factors that require special attention. To begin with, let's deal with what oils are:

1. "Synthetics", its composition is completely artificial chemicals.
2. "Mineralka". Made from natural components, the main of which is oil. It can also be called organic.
3. "Polysintetic". This oil combines the first and second appearance, representing their symbiosis.

Although mixing is allowed, but it is necessary to do this, according to experts in extremely rare cases, in which there really is not possible to comply with the recommendation of the manufacturer.

Oils of different types and their combination

If you used mineral for your engine motor lubricantIt is allowed to combine it with a semi-synthetic one. It is also possible mixing with oils that turned out as a result of the hydrocracking process. Another option that is suitable for adding to the mineral can be "synthetics", the basis of which polyalphaolefins (PJSC).

Such types of synthetic oils, as polyester, silicone and glycolic can enable mineral, but there are certain nuances. Here it is necessary to take into account the chemical composition of a specific synthetic product. It is better to specify this information directly from the automaker. There are cases when the oil level sharply fell, and the necessary, as it was called, is not at hand, then in synthetic or semi-synthetic oil You have to add some "mineral water".

When mixing oils of various high-temperature viscosity, the ultimate viscosity of the oil may change slightly

Synthetic oils and mixing them

Many brands today develop their oils in accordance with API standards (USA) and ACEA (Europe). Such an oil can be mixed with any similar manufacturer, also certified by API or ACEA. In this case, the possibility of obtaining a negative result, in which negative reactions may occur (the precipitate fell, foaming occurred) comes down to a minimum.

This suggests that if you used a synthetic oil for your motor, which is certified by the API or ACEA standards, then, in case of extreme need, you can safely pour the liquid of another company. But at the same time, it should also comply with these standards. Harm from this will not be. But at the first service station, it is better to replace this mixture to the oil, which is recommended by the manufacturer's manufacturer of your car, before, making the system washing.

The result of mixing "semi-synthetic" and "synthetics"

Another option is a mixture of 5W40 and 10W40 liquids, where the first refers to synthetic appearance, second to semi-synthetic. If the car is filled with "Synthetics", and you turned out to be in the field and level lubricant Fell, but in the presence you only have a canister with "semi-synthetic", then there is a way out. You can safely mix two oils 5W40 and 10W40. The viscosity of the mixture obtained will vary from 6W40 to 8W40, which depends on the ratio. The most successful option is to add to the existing lubricant, the oil of higher quality, that is, a semi-synthetic 10W40 can be diluted with synthetic 5W40.

In critical situations, mixing synthetics and semi-synthetic

Engine oils of one brand

Often, different products of one brand have a lot in common. Experts argue that "painlessly" can be addressed to the engine, the main thing is that its manufacturer is the same as in the actually filled into the engine. Even despite the previously reviewed classifications, such statements have a completely logical justification. All because the oils of one manufacturer have a large number of common elements, that is, the differences in their chemical composition are minimal.

Simply put, oils are manufactured on a common basis and have a similar set of additives. Therefore, the fluids of one manufacturer are allowed to be mixed in any proportions. We will not know that the same oil can be sold under various brands. In general, if you plan to transition from one level of viscosity to another, the best option will be the transition inside the line of one brand of oils. Did you think about whether even with a complete replacement of oil in the motor remains from 5 to 10% old liquid? Of course, this is a small amount, but still the likelihood of additive conflict remains. Consequently, it is easier to use oils of one manufacturer, especially as mentioned, when switching to another level of viscosity. That is, having in the engine semi-synthetic oil "N", synthetic oil should also be purchased by the brand "N".

Oils of different manufacturers

This is the most risky version and 100% guaranteed a successful result you can not be able to you. This is explained by the fact that each manufacturer's company uses its technologies and compositions with different additives. This does not mean that a negative chemical reaction can occur and oil foams or falls into the sediment. But there is no guarantee that the components of liquids of different marks will not reduce beneficial features Friend when mixed. Such cases are also found, although rarely.

Oils of various manufacturers companies have different sets of additives, mixing can cause their conflict

What do you get when mixing 5w30 and 5w40

The result of such a reaction is a slight decrease in high-temperature viscosity coefficient. For example, the level of engine oil in the engine sharply dropped. In the store of automotive products you reported that at the moment "Synthetics" 5W40 is not available, but there is similar working fluid With the same label, but another brand. In this case, you can take the oil 5w30 of the same manufacturer. The result of mixing in this case will not have a negative impact on your engine. If you tighten a significant volume, then everything that can happen is a non-critical viscosity decrease.

When the All-season working fluid is 5W30 or 5W40, the motor can be launched without problems at its temperature of 35 degrees. The result of mixing in this case will be a slight decrease in the temperature viscosity coefficient (numbers after "w" in marking). It is also not critical and significantly only when the engine is operating at extremely high temperatures. We hope that the above information will help you figure out which engine oils can be mixed.