Why in oil molybdenum. Is it possible to use motor oil with molybdenum? Features of the work of molybdenum additives in modern oils

What are the benefits of molybdenum oils?
We are talking about a solid lubricant, introduced into engine oil and forming layers reduced friction on metal surfaces. Studies have shown that this kind of supplements in oil is effective, first of all, in such industrial aggregates as a winch and gearboxes with cylindrical teeth. For high-speed gasoline engines In most cases, the results are negative.
Engine oil with disulfide Molybdenum is a physical mixture, and not a chemical solution. The dimensions of the solid particles of the Molybdenum disulfide are sufficiently large. When working in the engine, these particles fall not only in the desired friction zones, but also there, where such additives are not desirable, for example - in the zone piston rings.
Lubricants containing disulfide molybdenum when high temperatures do not rarely lead to climbing or depositing of solid products of combustion in the zone of piston rings, which adversely affects the work of the CPG (cylindro piston group). The resulting gas breakthrough into oil through the piston rings zone largely leads to high thermal loads and, consequently, to the enhanced formation of unwanted deposits. This fact explains why motor oils containing disulfide molybdenum are not recommended for use by large automotive firms.
Reducing friction is currently possible using special synthetic basic components. We are talking about the so-called complex synthetic ether products, according to its polarity and lubrication, comparable to castor oil. The latter is currently still partly used in racing cars. The esters have a high adhesive ability and form a very stable lubricant film. Dignity synthetic oils is their extremely high thermal stability.

In many products, the molybdenum disulfide and teflon (solids) are used as additives. The proportion of molybdenum is approximately 5 and it has a very good structure for lubrication. Molibden disulfide molecules (MOS2) move relative to each other, such as the sheets of the book. Graphite has a round shape, and molybdenum is a plate. The use of molybdenum would be justified if the engine was used without detergent additives.
In Germany, during World War II, Disulfide Molybdenum was used in tank troops. If oil leakage occurred, the engine could work for some time due to molybdenum sediments. The Americans during the War in Vietnam were lubricated by molybdenum oils of helicopters, so that in case of damage, do not fall as a stone, and for some time to hold out in the air and land.
The disadvantage of modern engine oils is that they contain a large amount of calcium. Calcium additives are reactive and they attack molybdenum additives before those in touch with the metal surface. As a result, a large molecule is formed, which settles on the filter. If B. modern oils Calcium was not used and such high demands were not charged to the purity of the engine, the Molybdenum disulfide would still be a modern and good additive. When using the Molybdenum disulfide, firstly, the calcium additives that support the purity of the engine, secondly, the filter is clogged and thereby damaging the engine.
Molybdenum additives OT. Liqui Moly. can be successfully applied in long formulated russian oilsnot containing zinc and calcium.
In its marketing activity, Liqui Moly operates with old information and does not sharpen customer attention on the fact that modern oils have a balanced package of additives.
The owner of Liqui Moly, leaving the firm who does not want to take into account the features of modern oils, founded a new company called Meguin, which has nothing to do with molybdenum additives.
Studying specifications or, for example, Mercedes-Benz sheets, it can be seen that Liqui Moly products containing molybdenum disulfide do not have licenses, because due to these additives sulphate ash rises so much that it does not fit normal.

In connection with numerous questions of users and customers of our store, about the use of additives with molybdenum, so, we decided to devote her an article. In this article, we will consider whether it is worth using this additive, and what is its effectiveness. What showed tests for use. And the main question: whether to pour this product In the car engine and why.

What is a molybdenum additive (MOS2)

The history of Liqui Moly began with this product, and to date, he still remains the leading oil additive. MOS2 was originally designed to maintain parts in good lubricated state, in piston aircraft engines. The molybdenum compound with sulfur has a minimal coefficient of friction and remains operational at high loads. Thus, the additive deserved the sympathy of buyers for many years.

So why use MOS2 Molybdenum?

With each kilometer traveled, you pay a tiny piece of the engine, due to friction and wear. Usually the consequence of such operation is the presence of metal in the engine. It is impossible to produce a perfectly smooth metal surface. Practical is impossible, so when considering under the microscope, any surface of the engine part looks like the surface of the moon, rough and uneven (as in the photo below).

How does the additive work?

Fortunately, the friction force will be reduced by smoothing the metal surfaces, pistons and cylinders, by impregnation of the place of their contact.

Using such a surface treatment with the use of solid lubricants, such as molybdenum disulfide, it will be possible to significantly reduce the friction force and reduce wear; In addition to everything, thanks to active agents in the engine oil, some damage are deleted.

MOS2 use efficiency?

The drug is fully suitable for all car enginesThe MOS2 additive is specifically designed to significantly extend the life of your engine (especially if it suffers the temporary loss of oil pressure), giving it maximum protection at high speed, good high performance.

Significantly reduces wear and extends the service life of the engine.

Less heat, smooth move, reduced fuel consumption.

Ideal for engines used at high load.

Can I use it in my car?

Liqui Moly MOS2 is suitable for all gasoline and diesel engines, safe and effective for all turbocharged cars. Fills when replacing the oil and operates during the entire period.

How to apply an additive

Liqui Moly MOS2 is simply added directly to the engine bay opening at any stage of the replacement.

About what characteristics a molybdenum additive in the engine is possessed, the views of the drivers will greatly differ. Some believe that the molybdenum disulfide causes only excellent qualities and improves the operation of the motor in general, others - that adding it into lubricants reduces the service life of the motor. So how does the molybdenum additive, added to the engine oils?

The molybdenum additive causes only excellent qualities and improves the operation of the motor.

Positive qualities Molybdenum

Modern requirements for automotive emissions into the atmosphere and for the efficiency of fuel consumption are becoming more and more high. They concern manufacturers like oils and cars. To improve these qualities and recreate antifriction layers in places where the oil film is impaired, molybdenum disulfide is used.

When using a molybdenum additive decreases the occurrence of jet downs.

Molybdenum additives possess such qualities:

• minimizing the occurrence of jets in the engine;
• giving lubricating and wear-resistant oil quality.

Antifriction compounds are added to many modern oils. Molybdenum favorably enters into a gray connection, which allows you to closely attached to the piston or other rubbing part, thereby adding lubricating properties and increasing the film layer in the engine.

It has been proven that in the presence of molybdenum disulfide in the oil composition, the metal surfaces of the engine elements reduce the likelihood of friction and completely eliminate the contact of the metal with other parts.

This means that wear with extreme driving and engine overheating is also excluded. Engine repair at the component level is required much less frequently.

Back to the category

How does Disuelfide Molybdenum work?

The additives of the molybdenum disulfide into lubricating fluids are capable of forming repeated shockproof layers.

Molybdenum disulfide When fully stabilized in a lubricant product is not precipitated spontaneously on the surface of the engine elements and even on the hydrocomathers. A very thin film MOS2 is formed, which does not overflow the gaps in any way in the engine and does not disturb the oil circulation in it. This film formation is not infinite, but ends at that time when the rates of increases and wear rates become approximately equal.

This occurs as a result of the permanent use of molybdenum additives when adding to lubricant or the use of oil with the content of molybdenum elements in it. When the driver stops using molybdenum and passes to traditional oil, the formed molybdenum film is wears, as a result of which the number of cases of the occurrence of scaling and the parts are rapid faster.

Therefore, modern engine oil has anti-promotional and wear-resistant properties. The additives of the molybdenum disulfide into lubricating fluids (including on a lithium-based basis) are capable of forming repeated shockproof layers.

Molybdenum additives as a separate liquid material for an additive to oil are becoming increasingly popular not only among motorists, but also:

• in production requiring high temperature excerpts (up to 400 ° C);
• for lubricating some production materials;
• as an additive in plastic masses to increase their dense qualities.

Back to the category

Negative qualities

For permanent use Gas impulses are formed this additive, the thermal load and the number of deposits are enhanced.

According to numerous studies, these additives are effective for industrial aggregates. In high-speed engines with continuous use (especially with lack of oil), solid molybdenum particles can fall into the area of \u200b\u200bthe rings for the pistons.

As a result, permanent work In high temperature conditions, combustion products may be postponed in the piston rings area. From this cylinder-piston group begins to work incorrectly. Gas impulses are formed, the thermal load is enhanced and, accordingly, the number of deposits. Therefore, some automakers are extremely recommended disulfide containing oil products as basic use. But what if the driver wants to reduce friction in the engine?

These are complex synthetic esters similar to physical properties with castor oil. Their use increases adhesion abilities and improves lubricating properties due to the formation of a thin but dense and stable film. The next advantage of oils with a large content in the composition of synthetic elements is a stable heat resistance and adaptation to excessively high temperatures.

For short-term extension of engine life military equipment The use of molybdenum is very appropriate. So the service life of tank technology can be extended under the condition of complete oil starvation. For cars, the use of molybdenum without oil is very harmful.

Oil properties with additive molybdenum are quickly lost.

Modern oil products in their composition contain a lot of calcium, which does not allow molybdenum to settle on the metal surface, therefore large molecules concentrating on the oil filter are formed. This means that the loss of calcium additives leads to the contamination of the engine, although lubricating properties are improved. Because if the driver has a desire to use similar additives, oil must contain an increased amount of calcium in its composition. And such oils have not yet been developed. In this case, the driver, trying to add a lubricant of anti-promotional properties, risks gaining a power failure associated with severe pollution.

In any case, when adding such additives is always required timely replacement Oil. It will not work for a long time without replacement. Oil properties with additive molybdenum are quickly lost. As a result, the oxygen effects (which is formed due to the decay of molybdenum molecules), first on the shortcut, the boot is broken, then it itself fails. If moisture gets into moisture, the metal elements of the engine are faster and, as a result, are seriously destroyed. And the use of this kind of lubricants for hub bearings dangerous.

To solve this issue manufacturers lubricating fluids We produce products with the content of special synthetic components.

A huge variety of oil mixtures produced for automotive engines allows you to choose motorists that product that they like most of all. This includes motor oil with molybdenum, about the exceptional qualities of which many have herself. With this additive traditionally produced oil liquids of the German brand Liqui Moly. As a rule, each medal has two sides. Therefore, let's try to figure out whether the molybdenum disulfide is used, except positive, negative effects.

History of appearance

Using Molybdenum Disulfide for Engines internal combustion It began in the United States at the end of World War II. Initially, this substance, in addition to metallurgy, was used in aviation. Molybdenum as a pure metal is not found. But such a compound as MOS2 mineral (molybdenite) is quite common. The Americans noted its antifriction and anti-corrosion qualities, resistance to high temperatures and good viscosity. Experiments on the use of this compound as a dispersed additive to aviation oils showed amazing results.

Thanks to the lubricating qualities of Molybdenum Disulfide, the engine of the aircraft could work without lubrication - the truth is not long. It was a kind of reinsurance - in case the oil highways or motor crankcase will be damaged. Then the pilot could reach the right place where the aircraft would be able to plant.

The idea to use this powder for other purposes came to the head of German Hans Henle, when he discovered Liqui Moly jars with powder molybdenum (in translation means "liquid molybdenum"). Having learned what they were applied, Hans decided to use molybdenite for motor oils. The results exceeded all expectations. In 1955, he bought a patent for the use of molybdenum disulfide and the right to this trademark, and by 1997 founded Liqui Moly GmbH.

Initially, molybdenum additives were sold to the KFZ series oils, designed for both engine oils and for transmission. Motor lubricants, which included MOS2, began to be issued only at the end of the 70s, after the sensational advertising actions of the additives of the moth. Two small vehicles VW-Kaefer were reinforced Lake Bodensee, having inside the motors instead of oil only molybdenum additive. This produced a furyor and caused a real boom to molybdenum disulfide.

The main properties of MOS2.

If we speak scientific language, the molybdenum disulfide is a friction modifier. This is one of the main additives that are part of any engine oil. Only for it are used different substances and their compounds - for example, manufacturers are used graphite. MOS2 is similar to him by many of its own qualities. Its molecular structure, being a lamellar, like graphite, consists of molybdenum and sulfur atoms, forming a very strong connection.

Good protective, antifriction and contamination qualities appear due to the fact that molybdenum and sulfur atoms are approximately the same in size. Thus, a uniform crystal lattice is formed. Being added to motor lubricantMolybdenum disulfide creates a solid film in places of contact of parts capable of withstanding a very large pressure without destruction. MOS2 molecules have high mobility in relation to each other. Therefore, the friction is sharply reduced between contacting details.

Molybdenum compounds perfectly show themselves at high temperatures (300-400 ° C), which accompanied the operation of the piston group. Other compounds, as a rule, lose their basic qualities at such temperature modes.

In addition to explicitly positive effects, this friction modifier has disadvantages: for example, the inability of dissolution in oil fluid. That is, the state of the powder can be called dispersed, which is a suspension consisting of quite large particles. Therefore, oils with molybdenum behave well not in all motors. Its applied to powerful engines, developing very high temperatures inside the cylinders. As a result, deposits and cocks are formed power unitsAlthough such information is not officially confirmed. It may well be that the reason for the formation of slags was different: calcium contained in other additives, especially detergents, actively affects MOS2, leveling all its good qualities. This process promotes high-temperature regime. Therefore, there are recommendations to relate to molybdenum-containing lubricants with caution.

Assortment of oils Liqui Moly

Today, the German company produces a large range of engine oils - from high-quality mineral to fully synthetic, called Hightech-Oel. Products have different price categories. Molybdenum in engine oils is present as a friction modifier. If molybdenite had adversely affected some power units, probably oils would not be certified by the API classifier (American Institute of Oil) as Energy Saving (Energy Conserving, EC), as well as ASA (European Car Manufacturers Association).

The use of the oils of the German manufacturer saves from 1.5 to 2% of fuel. One of the legendary brands, which brought the army of fans and recognition of molybdenite - MOS2 engine oil Leichtlauf SAE 10W-40. This is a semi-synthetic product, the basis of which by 40% is a real synthesized synthetic based on polyalphaolefins (PJSC). The remaining 60% is a high-quality purified mineral composition. In addition to MOS2 lubricant Contains additional anti-wear additives.

Thus, two layers are formed between rubbing surfaces. When one of them ceases to work because of the production, its place is occupied by molybdenite. He has so small structure that he is not delayed oil filters, remaining in suspension. Thanks to him, the lubricant preserves its main anti-wear qualities throughout the interval between replacements. The classifier API assigned the product with the value of SL / CF, ASEA determined its categories as A3-04 / B4-04. Lubrication is suitable for petrol aggregatesand diesel engines.

Fully synthetic energy-saving lubricants include Special Tec AA 5W-30. This is a modern lubricating composition that can be used with a replacement interval up to 40 thousand kilometers! He is assigned the highest categories of API classifiers, as well as ilsac - Sn / CF and GF-5, respectively. The product has many official tolerances from European and Asian automakers:

There are quite some products in the world with such an impressive list of tolerances. All this talks about the magnificent performance characteristics of this engine oil.

For some time on the market supplies Technical lubricants with molybdenum components appeared for cars. In most cases, the presence of molybdenum in motor oil Served as a chip, thanks to which the lubricant makes great qualities. On the one hand, it corresponds to the truth, on the other hand, there are increasingly reviews about his harmful effects. Let's try to figure out.

MOS2 is usually used in the metallurgical industry. Its positive properties include:

• Protects against corrosion;
• Ferry-resistant;
• Differs good viscosity.

These characteristics are interested in manufacturers of motor oils. They began to include it in the liquid. Such oils other than molybdenum have a large number of special additives that help stable work Engine.

Today, the newest motor fluids includes Molybdenum Disulfide. There is no unambiguous opinion about his engineering of the engine. The fact is that the presence of this substance differs in different ways different brands cars.

Principle of work Molybdenum

All MOS2 actions resemble graphite particles. It includes a graphite platform, which has the appearance of the finest plate. The compound consists of two sulfur atoms, as well as one molybdenum atom. As a result, a strong connection is formed. Such a means is characterized by a powerful antifriction function. The oil includes:

• Ceramics;
• Estheri;
• Graphite.

The molybdenum component is manufactured as a separate additive. It can be added to oil to improve its technical characteristics.

Positive influence Molybdenum

When creating motor oil with molybdenum, all the requirements of car manufacturers were taken into account. Therefore, such products have a number of very useful benefits:

• The use of friction modifiers increase energy-saving characteristics;
• Prevents the appearance of scaling;
• Protects against increased wear;
• Excellent antifriction indicators;
• Friction force decreases;
• Counteracts engine overheating.

In principle, the sulfur molecules are not capable of creating a powerful connection, but in conjunction with MOS2 it turns out a powerful bunch. When such a substance falls into motor fluidMetal surfaces begin to be covered with durable protective layers.

Lubricating fluid contains its minimum amount, therefore it does not affect the operation of the valve system, the workforce remains stable.

There are many special additives in modern lubricants. This makes it possible to form a molybdenum disulfide to form an additional lubricant layer. He begins to act if you change operational properties Standard fluid. Disulfide Molybdenum is sold today in the auto chemical departments.

When mixing specialized oil with MOS2, the properties of the machine are noticeably improved. Molybdenum is capable of working at very low or high temperatures. Ordinary lubricant is not capable of carrying out such actions.

MOS2 with gray is able to withstand 400 degrees. Such an additive can also be used in other extreme conditions. She found use in accurate mechanics, add to various plastic materials.

Negative moments

There is an opinion that molybdenum supplements are better to use in large power plants. They are not at all suitable for petrol systems. The reason is simple - particles of molybdenum and sulfur compound have enough big sizes. They can get into the zone the work of the piston rings, which will lead to the failure of the engine itself.

Lubrication with molybdenum additive when the temperature reaches high values, enhances coking. As a result, work is violated piston system. The exhaust gases begin to pass through it, thermal loads increase. You have to repair the engine. It is this factor that restrains many world concerns to recommend widespread use of a molybdenum additive.

To reduce the power of friction, it is impossible to do without a synthetic basis. It should consist of artificial potent esters whose properties are similar to castor oil. Such additives began to add frequently to racing carsSince they are able to withstand a large temperature.

As part of the newest lubricating products, a considerable amount occupies calcium, which enters into an aggressive reaction with MOS2. This is much earlier than the substance will have time to cover the metal surface.

Before purchasing a molybdenum additive, the car enthusiast should learn all the positive and negative characteristics of this substance. By adding molybdenum disulfide into lubricant, you can disrupt the engine operation.

If the process of detergent additives are not included in the process, the molybdenum additive will be reliably protected fuel system cars. In wartime, molybdenum was used as a lubricant for tanks. In the case of an unexpected leakage of lubric fluid, the engine saved molybdenum. He continued to work. Such an effect arose due to the lack of special detergent additives in the oils of military equipment.

The output is unequivocal. Molybdenum can be added to oil when there are no detergent additives.