Can I use a liquid 5w - 40 instead of 5w - 30? For each car model, the factory indicates a list of motor mixtures. This is connected with the design and technical characteristics Engine. To correctly replace one liquid of another, it is necessary to get acquainted with the features of their use.
SAE marking means:
- 5W - Winter, from Winter - Winter. The turning temperature is -30 0 C, and pumping - 35 0 C;
- 30 - viscosity indicator, approximated to 12.6 mm 2 / s, is responsible for the formation of a protective film on the elements of the motor at a maximum temperature of +20 0 s;
- 40 - viscosity indicator, approximated to 16.3 mm 2 / s, is responsible for the formation of a protective film on an engine elements at a temperature of +35 0 C.
There are no differences between low-temperature viscosity in these mixtures, their mobility is reduced at the same temperature. Liquids differ in fluid. 5W - 30 more liquid, ensures the start of the motor without heating and pumping the fluid on the lubrication system at minus temperatures.
Features of the work of the power unit in the summer
What happens if the oil is 5w - 40 instead of 5w - 30? The first less fluid, has a large viscosity parameter than 5W - 30. When it interacts with moving elements of the motor, a stronger hydraulic resistance is created, so fuel consumption will increase. At high temperature overboard the car, this disadvantage turns into dignity: a thick mixture is slower thanks, the protective film on the engine elements will prevent the wear of the parts. 5w - 30 in similar conditions will not cope with overheating power aggregate. This will lead to the rupture of the protective film, dry friction will arise.
If a car has passed more than 100 thousand km., Its elements of its motor under the influence of friction force were worn out, the gaps in the friction nodes (crankshaft-insert or piston-cylinder) increased. In such a situation, you can pour 5w - 40 instead of a more liquid mixture to increase the thickness of the protective oil film to ensure normal engine operation. This will reduce wear piston group, reduce oil losses on a volunteer. If you pour the liquid mixture (with less viscosity), the gaps in the friction nodes will not be filled with a motor fluid, a large volume of oil will fall to the combustion chamber and will increase the flow rate, the thickness of the oil film will be insufficient to protect the details from wear.
For new machines with a mileage of up to 70 thousand km. Application 5W - 40 is unacceptable (if this is not a manufacturer's recommendation): It will not fill the gaps in the friction nodes, will increase the load on the motor and the oil pump.
Outcome
Answering the question: "Can I use 5W - 40 liquid instead of 5w - 30?", It is necessary to take into account not only the viscosity of the mixtures, but also their characteristics on the API and ASEA. It is important that the selected oil does not have worse parameters than the previous one. If you used the synthetics, you should not switch to mineral water, or instead of imported brands apply domestic stamps. More details about the properties of oils can be found from the video:
Filling 5W - 40 instead of a liquid mixture, take into account the manufacturer's manufacturer's recommendations, engine mileage, temperature overboard machines. Differences in the engine will not immediately be visible (except for oil consumption), but if the mixture is incorrectly selected (it increases the load on the power unit, dry friction of parts occurs when it occurs), overhaul Motor is inevitable. Before replacing the oil, consider the following factors.
- For cars S. big mileage Pouring automotive liquids with low viscosity is irrational.
- Specified oils are distinguished by fluidity at high temperatures.
- It is thick - it is better to apply in summer to protect the engine from overheating, and liquid - winter to start a motor without warming up.
- Temperature-viscous characteristics of oils affect the stability of the power unit, the formation of a protective film.
- Do not evaluate the quality of the engine fluid on it appearance: Certain additives are added to the mixture base, which can change its color to darker. We need to judge the quality of the mixture only on the certificate attached to it and the presence of special labeling on the canister.
If you doubt what fluid is better to fill, consult a dealer. Preferences give certified products.
Yep. 23-04-2010 07:39
since faca is not, for the hundredth time ask a question
Maksim V. 23-04-2010 08:04
Yes, nothing will be. If the car with good mileage It will increase oil consumption, as 5W30 is more liquid. Once there was a table with the tolerances for operation at different temperatures so 5W40 is designed to operate from -20 to + 45, and 5W30 from - 25 to + 33.
On a worried motor, when working on a xx on a more liquid oil can knock "hydrics".
But, as far as I remember on my "Fawn -306", 5W30 was indicated as the main, on many modern gaps, the gaps are so small that the more thick oil, on the new motor, simply will not climb into the gap between rubbing pairs. There was an information that Audi from the conveyor goes on the oil 0W30.
So. What you need to look under the operating conditions and the status of the motor. If the mileage is "weaving", yes in a major city by "corks" crawl, it is better not necessary.
Well, if in winter in Surgut or Tyumen, then you need to pour 5w30.
Yep. 23-04-2010 08:08
mileage 56 Tyk, and car - relative Peugeot 307GO - CITRO C4
nobap 23-04-2010 09:05
AT service book Posted tolerances. In general, it will go, the main thing is not to fly.
Yep. 23-04-2010 09:13
that is, even for the summer - Nifiga is terrible?
Hrum. 23-04-2010 09:32
yes nothing will be
Ramil 23-04-2010 09:41
Well, if in winter in Surgut or Tyumen, then you need to pour 5w30.
5w40. The rest is the divorce of rustic suckers in Siberia
Henri. 23-04-2010 14:06
qUOTE: And what will happen if instead of 5w40 pour 5w30
that is, even for the summer - Nifiga is terrible?
Rainbow. 23-04-2010 14:31
qUOTE: Originally Posted by Maksim V:The operating temperature of the engine is greater than +45 and +33 degrees, then what to do?
Once there was a table with the tolerances for operation at different temperatures so 5W40 is designed to operate from -20 to + 45, and 5W30 from - 25 to + 33.
In the training of catcher oils, it is written that the oil with a viscosity of 5W30 cannot be pouring into Volkswagen engines issued until July 1999.
Lightly increase oil consumption on hot days.
The engine operating temperature is almost the same as in the heat, which is in the cold.
Rainbow. 23-04-2010 14:51
qUOTE: Originally Posted by Maksim V:
Well, this is what happens here?
The fluidity and viscosity of the oil is estimated at 100 Celsius.
And if you follow your logic, the oil brand should be alone.
I am just writing about this, the parameter after W shows the conditional viscosity of the oil at 100 degrees. And not viscosity at temperatures ambient.
Yep. 23-04-2010 20:28
qUOTE: Originally Posted by Henri:
Counter question: why go to another oil? Especially on a fairly fresh car. Engines oh how do not like change.
i accidentally bought not the oil.
but the problem was already decided - I paid a hundred rubles and exchanged for 5W40
The question of adding oil 5W30 in 5W40 never loses its relevance. Such an opportunity often interests many car owners who, in turn, do not hurry to mix lubricants, fearing the consequences of such experiments. It should be immediately noted that such solutions are not recommended to take too often. It is advisable to top up such a liquid into the engine, which is already nanitis. Attentive drivers always have a small additional canister with butter on top of the top.
Is it possible to combine 5W30 and 5W40?
On the road there are different situations, the need to borrow lubricant liquid Other drivers from time to time can also occur. In such cases, it is necessary to know for sure whether the fastening fluid is compatible with the basic.
To determine the possibility of harmless combination of lubricants, it is recommended in more detail with the properties of oil corresponding to each designation by this kind Classification.
What is a SAE classification?
This is classification motor oil According to the degree of viscosity, implemented by the American community of automotive engineers, which divides lubricants to separate subspecies in accordance with the possibility of their operation in a certain temperature mode.
The viscosity of the lubricant is determined by the nature of the friction arising between the molecules of this substance.
You can characterize several types of viscosity:
- The kinematic viscosity is measured at two fixed temperature modes corresponding to 40 C ° and 100 s °. Measurement occurs by fixing the duration of the leakage of a certain volume of fluid from a narrow pressure vessel;
- Fixed the minimum temperature at which oil pump can pump fluid.
- Dynamic viscosity is measured in MPa X sec. At temperature exposure 150 s °.
- The minimum temperature at which the starter turning into action can be activated.
The SAE classification provides consumers information about the temperature range of the working environment in which the starter will qualitatively perform its function, the oil pump will pump fluid through the entire system during cold start.
By SAE Oil They are divided into 6 winter (0W, 5W, 10W, 15W, 20W and 25W) and five year old (20, 30, 40, 50 and 60) classes. The greater the coefficient, the greater, respectively, the degree of viscosity of the fluid.
All-season oils capable of performing the necessary functions in a wide temperature range are marked with a double marking that determines the winter and summer class, for example, 0W30 means that the lubricant must be poured into the engine with the calculation of the operating temperature from 0 C ° to 30 s °.
It suggests that it is suited to add to oil with a class of viscosity in SAE 5W30. Fluid 5W40 is suitable. It should be understood that 5W30 is not recommended to top up in 5W40 if the ambient temperature during operation vehicle above 30 s °. In such cases, it is not recommended to interfere with two mentioned varieties. lubricants. This may adversely affect the flowing characteristics of the fluid.
What are the misconceptions most often meet among the conclusions of the car owners?
Some vehicle owners believe that the additives contained in different oilsx, can determine the development of a chemical reaction dangerous for engine mechanisms. In fact, the characteristics of the modern lubricant, if not to take into account the worst and most qualitative, all manufacturers are about the same, with the exception of individual examples. Of course, each manufacturer wants the qualitative characteristics of its products at height.
Tightening the 5W30 liquid in 5W40 or vice versa is permissible, even if they are made by different manufacturers. There are no lubricants that are able to save the engine from the problems that have arisen. Thanks motor fluids You can only hide these problems for a while and delay the need for their permission.
To dispel all the doubts of motorists, it should be noted that it is impossible to turn the entire engine with a plot of irregular oil.
Some drivers believe that it is impossible to interfere with 0W30 oil with other varieties, and only the same product can be used to toll into the engine.
This opinion is erroneously, since in modern units, lubricants additionally perform the function of hydraulic fluid. For example, the normal functioning of VTEC valves or the VTC gear is possible only at the appropriate fluid pressure at a specific point. Consequently, if the conversation comes on the hydraulic properties, certain viscosity requirements should be placed on the liquid.
Most likely, this is exactly what numerous recommendations on the pouring of low-grade lubricants in modern engines. In this case, the alkaline activity of lubricants must be optimal to clean inaccessible places from various savings. If you do not fulfill a timely replacement or pour a poor-quality product, you can over time to get problems with the operation of the engine.
Errors in the selection of a suitable lubricant can subsequently cause serious trouble. Fresh oil with a higher viscosity rate than 0W30, you can simulate in the engine and overcome 2000-3000 km, without worrying about anything. It is best to operate the vehicle only in the conditions of the city.
Also among car owners there is an opinion that it is unacceptable to fill 5W30 into a motor filled with liquid 5W40. It will be ideal if the viscosity indicator of the lubricative means corresponds to what the elements of the motor already flow around. But if the liquid is poured out of it technical reasons and will soon have to hold repair work, It is possible without fears to combine various lubricants in any proportions.
Some manufacturers create "crossed" liquids of varying degrees of viscosity, the combination of which practically does not cause negative consequences.
Mixing synthetic and mineral oils 5W30 and 5W40
Is it possible to mix the synthetics with mineral
Immediately we can say that nothing bad will happen if you try to mix liquid on a synthetic basis and semi-synthetic. Such a combination can maintain a car in a working condition for a very long time and nothing bad will not happen to him. Naturally, it is better to resort to such solutions only for the absence of the same lubricating agent. In the conditions of the city, of course, it is preferable to try not to interfere with different liquids.
Possible negative consequences
As mentioned earlier, the result of mixing liquids 5W-30 and 5W-40 may be a slight decrease in high-temperature viscosity indicators. When the amount of lubricant decreases sharply and it is not possible to fill the motor with the same liquid, you can use the substance of the same manufacturer, but with another indicator of the molecule compound density. Negative impact on power installation It does not turn out if the driver decided to mix two different oils of one brand. A little slight decrease in viscosity levels can occur.
In the course of operation of all-season lubricating materials with a viscosity of 5W-30 or 5W-40, the engine starts without much difficulties even during the heat that dopes up to 35 s °. If you mix the two of these composition, the temperature viscosity level will be reduced by several degrees. This condition is critical because there is a direct impact on the operational characteristics of the motors at elevated operating temperature.
If you mix synthetic fluids suitable in the conditions of the forty-gradual heat, it is not eliminated by the likelihood of difficulties with the functional characteristics of the engine due to incompatible additives. The fact is that manufacturers use various technologies to increase the viscosity characteristics of their lubricating materials, which implies the use of some components. If you try to mix them, as a result there may be a composition that will interfere with the normal operation of the engine and gradually lead it into disrepair.
When combing mineral and synthetic composition, problems may occur with the operational characteristics of the engines, expressed in the accelerated wear of the gaskets. The reason for the lack of a stable viscosity in the lubricating agents on a mineral basis. For such combinations, it is recommended to operate only special additives, but the likelihood of the negative impact on the structure of the synthetic component of the liquid used is not excluded. Therefore, experts recommend to familiarize themselves with the materials set forth in the instruction manual of the vehicle of a certain model before combining different types lubricating materials.
What should I say in conclusion?
If you take into account all the above arguments, each vehicle owner can easily be determined whether it is possible to interfere with 5W30 and 5W40. Therefore, in a situation where, during the movement, it is found that the lubricants in the engine almost did not remain and still have to overcome the considerable distance, it can be borrowed from the drivers passing by a little liquid, boldly mix it with the fact that it is already flooded into the engine and quietly continue to move.
And a little about the secrets of the author
My life is not only connected with the car, namely repair and maintenance. But also I have a hobby like all men. My hobby is fishing.
I started a personal blog in which I share my experience. Many things try, various methods and methods for increasing the catch. If interested, you can read. Nothing superfluous, only my personal experience.
ATTENTION, only today!
5W30 and 5W40 - What is the difference of motor oils Many drivers do not know what is the difference between the engine oil 5W40 and 5W30, and which of them is better suitable for the engine of their car. In fact, the main difference is the difference between the viscosity of the oil, and their operation at low and high temperatures. Therefore, the question "What kind of oil is better?" incorrect. It is much more important to know the properties of the listed engine oils and their type (synthetic or semi-synthetic), as well as recommendations regarding the application for the engine of your car. This will provide normal work Motor under any operating conditions. First of all, it is necessary to figure out what the symbols shown on the canisters with engine oil mean. They indicate its viscosity-temperature properties in accordance with the international SAE J300 standard. There are all-season oils to which the types 5W30 and 5W40 are indicated by two numbers. We will tell about decoding oils: the first digit "5" means that the oil can be used at a minimum temperature -30 ° C. Moreover, the value of the maximum viscosity for turning will be 6600 MPa · s. And the maximum viscosity viscosity is 60000 at a temperature of -35 ° C. As for high-temperature viscosity, then at + 100 ° C minimum value It will be 3.8 mm² / s. The number "30" tells us about the viscosity of the oil at high temperatures. In particular, oil with such designation has a minimal viscosity of 9.3 mm² / s, and the maximum to 12.5 mm² / s. Also, the oil is characterized by such a thing as HTHS - High Temperature High Shear Rate. It determines the strength of the oil on the shift at high temperatures, that is, the stability of the viscosity characteristic. In particular, oils with the number "30" in the marking of the HHS value is 2.9 MPa · C at ambient temperature + 150 ° C, and shift speeds 1/1000000 second. As for the number "40", its decoding is similar. Oil 5W-40 has a high-temperature viscosity in the range of 12.5 ... 16.3 mm² / s, and the value of HTHS is the same 2.9 MPa · C at ambient temperature + 150 ° С, and shift speeds 1/10000 seconds . Letter W in the designation of oils means the English word Winter, which is translated as winter. That is, oils are considered all-season. From the above reference information it becomes clear that the main difference between 5W30 from 5W40 is a high temperature viscosity. That is, the oil 5W40 can operate at higher temperatures, providing normal operating characteristics of the motor. Otherwise, these oils possess the same characteristics, so under certain conditions they can be considered interchangeable. The viscosity of the oil at different temperatures is critical for the engine. That is why the slightest deviation from the standards recommended by the manufacturer may lead to the fact that the motor will not work in optimal conditions, and this is a direct way to its significant wear and rapid failure. However, it is not only viscosity. At the choice of the oil brand, the tolerances are also dependent on which it is designed to work in the engine. However, it is better to explain on the examples. So, if the engine of your car is designed to use 5W30 engine oil, and for some reason 4W40 flooded, thus the load on the oil pump will increase, and the friction will increase between metal pairs, since at the same oil temperature will be have different viscositySo it will cover the details protective films Different thickness. In addition, in this case, oil consumption in the system will decrease, which is harmful to moving parts of the motor, since for this reason oil starvation and excessive wear of the engine will occur. If the engine, on the contrary, is designed for 5w40, and you bought 5W30, then for it such oil will be too liquid. The film will be bad to stay on the working surfaces, which is why the engine will work with excessive wear. Answering the question of which oil is thick 5W30 or 5W40, it is worth adding that at the engine operating temperature + 120 ° C ... + 140 ° C viscosity of 5W40 oil is approximately one and a half times higher than that of 5W30. Most modern manufacturers passenger cars Recommend to use for engine oils with label 5W40. His viscosity and tolerances are considered averaged. If you are owner new car, or her engine recently passed overhaul, then some time you can use 5W30. And if you have an old car with a big mileage, it is better to pour into the engine oil 10W40. It will provide best job Power unit and will not leak. When discussing the difference in oil properties, sometimes there is an interesting question about whether it is possible to pour 5w40 oil instead of 5W30? Since the first is more thick, it can be done only in case the engine design allows ( oil canals wide enough). For example, some motors Ford. They have thin channels, and for them such a mixing is unacceptable. The oil pump will be very hard to drive the composition through them. And this will lead to significant depreciation of the pump and oil starvation of the engine. But reverse procedure, that is, 5W30 instead of 5W40 is allowed. But in any case, you need to know the nuances of the engine device or consult with a worker a hundred. As for the question of what is different 5W40 from 10W40, then it is understandable from the above decryption they have a different lower (winter) yield strength. 5W40 marking oil is intended for operation in more frosty weather (up to -30 ° C, while 10W40 is only up to -25 ° C). The upper limits of their performance characteristics are the same. It can be seen that it is better than 5W30 or 5W40 in winter have more suitable characteristics than 10W40. If you have a car with a turbocharger, then for it it is necessary for it 5W30, unless other information is specified in the service book. Another difference between oil 5W30 and 5W40 lies in the length of the synthetic chains that are their basis. And the more the difference between the winter and summer temperature coefficient in the designation (in our case it is 5w40), the more these chains are longer. And what they are longer, the motor oil is calculated at a smaller operating time. Many drivers in virtue of different circumstances arises a natural question - is it possible to mix oil 5W30 and 5W40? At this expense, specialists have many different opinions, often contradictory. Looking in advance, let's say that it is possible to mix them, but it is worth it only in extreme cases and use the machine on such a mixture for long. The difference in viscosity is 5W30 and 5W40 is small. And this means that, with other things being equal in the average temperature mode, the engine when mixing two oils will not receive damage from significant wear. Each manufacturer of motor semi-synthetic and synthetic oils makes their products based on the so-called basic oil and additives. And if the base oil in all is approximately the same, as for additives, they may differ, albeit slightly. but original oils Famous brands that correspond to the American API standard and European ACEA are always compatible with each other! The fact is that such a requirement is spelled out directly in these standards, and if it is not taken into account, then their manufacturers simply will receive a ban on the realization of their products on the market. So you can say with confidence that if you mix 5W30 and 5W40 even different marks - It will not happen anything terrible. You can even in pairwise mix mineral, semi-synthetic and synthetic oil. However, remember that such mixing is permissible only for short trips, and in case of extreme need. This is especially true of mixing mineral and synthetic oils. And on an ongoing basis, it is necessary to pour into the engine the composition recommended by the manufacturer of your car. Also do not forget to change the oil in the engine in time. Usually do it every 8 ... 12 thousand kilometers of run, depending on the mode of operation of the machine.
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Is it possible to mix engine oils 5W30 and 5W40 from one manufacturer?
Many car owners are interested in a common question - is it possible to mix brands oil5w30 and 5w40 between themselves? The situation when it has to do may occur for various reasons. For example, the use of oil residues in the garage, the lack of the required liquid brand in the store, when it is necessary to add oil into the engine and so on. The answer to this question is simple - yes,mix can, however, under certain conditions . But first things first.
Motor oils 5W30 and 5W40 Differences between oils
First of all, it is necessary to figure out what the oils of the brands 5W30 and 5W40 are different. The first figure of "5" tells us that both oils can be used in the cold at minimum temperatures up to -30 ° C. But the second temperature coefficient indicates the difference between them. Thus, the number "30" means that the oil 5W30 can be used to the maximum temperature of + 35 ° C. And the coefficient "40" indicates the maximum operating temperature to + 45 ° C. Moreover, we are not talking about the oil temperature in the engine (this value exceeds the a hundred degrees), but about the ambient temperature.
That is, it is obvious that the oil 5W30 is more liquid in consistency, and 5W40 is more dense. Differences in performance characteristics This end. It remains only the difference in the type of oils - mineral, semi-synthetic or completely synthetic. But since mineral oils Currently, they are almost not used, they will stop their attention on the last two types.
Table of viscosity of oil by SAE from air temperature Is it possible to mix oil 5w30 and 5w40
Synthetic and semi-synthetic oils are manufactured based on base oil and synthetic additives. Modern manufacturers as basic oil use approximately the same composition. But as for the additives, they differ, albeit slightly. However, as it is neither paradoxically, they are all compatible with each other! After all, such a requirement is clearly spelled out in regulating the world market of oils standards. For the US, this API, and for the European Union - ACEA. Thus, mixing any synthetic and semi-synthetic oils Between itself is permissible.
Accordingly, the oils 5W30 and 5W40 can also be mixed. But here it is worth understanding additionally. When mixing these compositions, oil is obtained with an indicator of 5W3x, where X is any digit, depending on the number of one and the other component. And such a compositionyou can use only a short time! After all, the automakers are no wonder clearly indicate the engine oil brand for the engine, since it is designed to work with a liquid of a specific consistency.
If the oil is too liquid for the motor, it will not be able to effectively lubricate the working surfaces of rubbing metal steam. And if the composition is too thick, it will create additional load On the oil pump, and can also lead to the oil starvation of the engine. In any case, the motor in one and another is deprived necessary protectionthat provides him with oil. And this is a direct path to increased engine wear and its premature repairs or even failure.
How to proceed
What to do to the driver when it is necessary to mix 5W30 and 5W40? Our recommendation will be the following. You can mix these two stamps, absolutely not worrying for the safety of the engine. Even if the compositions will be from different manufacturers and different types (synthetics and semi-synthetic). For the engine much harmful will work in conditions oil starvation. Therefore, you can felt safely.
However, it is impossible to ride such a mixture for a long time! At the first opportunity, buy an oil in the auto shop, which recommends that the manufacturer of your car and replace the oil (independently or per service station). At the same time, it is desirable (albeit not necessarily) to wash the engine. This is especially true if you used old oil with significant mileage. Also, do not forget to change the oil on time and periodically check its level, but if necessary, add.
Additional information about oils 5W30 and 5W40, their differences, application, labeling and otherwise you will learn in a more complete article.
