A very popular question among motorists is which shock absorbers are better: gas or oil, or gas-oil? Moreover, he is interested not only in lovers of a comfortable ride, but also in those who consider themselves to be "racers". In fact, shock absorbers provide many important parameters of the car, and above all - handling and directional stability.
Why do we need shock absorbers in a car, how they are arranged and work, what types of shock absorbers are and what are their advantages and disadvantages - the answers to these questions will help you make the right choice among a large number of manufacturers of these products on the Russian market.
At the end of the article, as usual, you can watch a video in which the author tells and shows which shock absorbers are better to choose (gas, oil or gas-oil) and how they differ from each other.
A shock absorber is an integral part of what provides comfort in the car body (sprung mass in technical terminology). The opposite of this term can be clearly illustrated with an old village cart on wooden wheels with a metal rim. It is easy to imagine how the passengers in such a wagon shake when driving on a rough dirt road.
To smooth out this shaking from potholes and potholes (or in technical terms, to damp vibrations in the vertical plane arising from road obstacles) is the main function of shock absorbers. Schematically, the shock absorber can be represented as a spring located between the wheels of the car (the tire, by the way, is also a kind of spring in this diagram) and the body.
In general, to assess the response to vertical impacts of the road, a car can be represented as a mechanical system consisting of many weights, springs and friction knots, interconnected in a complex way and providing the required smoothness. And shock absorbers play an important role in this scheme.
The principle of operation and the main types of shock absorbers (oil, gas, gas-oil)
You can illustrate the principle of the shock absorber with a simple example (see the pictures above):
- The lower part of the spring-loaded suspension strut is connected to the wheel through the shock absorber rod, and the upper part is connected to the car body.
- The impact from unevenness through the wheel is transmitted to the rod, which moves the piston inside the cylinder.
- There are two bypass valves in the piston (simplified - holes of different diameters), which allow almost incompressible oil to pass at a higher speed when the rod (and hence the wheel) moves up, and with a lower one - down.
Thus, the hydraulic part of the shock absorber works as a conditionally soft spring for compression, and a hard one for tension (“rebound” in technical terminology).
The mechanical spring in the figure is shown to a greater extent for clarity, but in practice it expands the possibilities of settings and serves as a kind of limiter when the shock absorber hydraulic cylinder fails.
The definition of "oil shock absorber" implies that only hydraulic oil is used as a working material in the cylinder. The dynamics of the oil shock absorber is entirely determined by the work (performance) of the bypass valves.
To expand the dynamic range and adjustment possibilities of oil shock absorbers, a kind of gas “cushion” was invented. The fact is that gases, unlike liquids, are compressed, and non-linearly (not proportional to the movement of the rod). This means that being "attached" to the "oil" part of the cylinder, they will make the dynamics of such a system richer.
The figure below shows a simplified design of a single-tube gas shock absorber.
Scheme of a single-tube gas shock absorber
It is clear that without the lower (gas) part, it becomes oily (only the squeezed out excess must be put somewhere, but more on that below).
And since shock absorbers filled exclusively with gas are not yet found on production cars, it is more correct to call such a design a “gas-oil shock absorber”.
For oil and gas-oil shock absorbers, the working cylinder of the device is usually two-pipe:
- In oil shock absorbers, excess oil comes out into the second (larger diameter) pipe through additional valves during compression, “pressed” in the second pipe by air.
- In gas-oil shock absorbers, a gas cushion (usually nitrogen under pressure) is pumped into the second pipe instead of air.
Sometimes the gas cushion in gas-oil shock absorbers is structurally located on the side of the cylinder.
Main types of shock absorbers
In addition to a narrower range of elasticity characteristics, the cushion of air in the oil shock absorber does not effectively dissipate the heat energy released during intensive work, which sometimes leads to the boiling of the working fluid. In a gas-oil shock absorber, this effect is excluded.
Like any hydraulic technique, shock absorber cylinders require high-precision (precision) machining, a complex system of valves and seals, and for gas-oil shock absorbers this system only becomes more complicated.
Since the gas-filled part of the shock absorber significantly expands the dynamic range of the system, in general, the device assumes a softer response to road bumps than in the "oil" version - it's like a series connection of two springs: soft and hard, which in total gives a softer response than just a hard one. spring.
Interestingly, manufacturers do exactly the opposite and adjust gas shock absorbers to a greater extent for an aggressive driving style and sports cars. More precisely, on well-paved roads, the gas dampers are set to a softer response from vertical influences, and on bad roads with the same settings they become stiffer.
It must be emphasized that in sports driving, smoothness is far from in the first place: parameters such as handling and directional stability are much more important, which gas shock absorbers provide better than oil ones.
The Russian market of shock absorbers for foreign cars with a share of the main players of 10 percent or more, according to the Autoinstruction magazine, is represented by several well-known companies (diagram in the figure above):
- KYB (Kayaba) - 35%;
- Boge (God) - 16%;
- Fenox (Phenox) - 15%;
- Monroe (Monroe) - 14%;
- Bilstein (Bilstein) - 11%;
- Other firms - 9%.
It is interesting that during a survey of service centers conducted by the publication "Kuzov", for the recommendations of professionals on the choice of a manufacturer of high-quality shock absorbers, the picture turned out to be somewhat different.
With firms such as KYB, Bilstein, and Boge leading the way, Monroe is only 5% of the time pros recommend it, even though the firm's market share is nearly three times higher. And they practically do not recommend the Belarusian brand Fenox, the share of products of which is very significant - 15%.
To figure out which shock absorbers are better to put, it is necessary to briefly dwell on the characteristics of the leading players in the Russian market.
- KYB(Kayaba) - the products of the Japanese concern are popular not only in Russia, but also in Europe due to their high quality and reliability at a relatively low price level. Shock absorbers of this company can be found on the conveyors of well-known European automakers. The gas-oil shock absorber of the Ultra SR series is especially popular with Russian sports driving enthusiasts;
- Bilstein(Bilstein) is a world famous German company that has been manufacturing shock absorbers for over 50 years. It was here that the design of a single-tube gas-filled shock absorber was developed. Bilstein products are installed on European premium brands: BMW, Porsche, Mercedes, Ferrari, Maseratti, Jaguar;
- God(Boge) - the brand belongs to the concern ZF Friedrichshafen AG (Germany) - one of the world's oldest manufacturers of shock absorbers. Recently moved to another well-known brand - SACHS and now the same type of products are produced under two trademarks. The concern's products cover more than 90% of the range of world automakers. On the Russian market, a 1-year warranty is provided, regardless of mileage;
- Monroe(Monroe) is an American company whose products are probably the most famous in Europe and are intended for 99% of the world's makes and models of cars. Monroe's latest developments - Sensatrac series gas shock absorbers provide high controllability and instant response to changing driving conditions;
- Koni(Horses) - shock absorbers - this is the only product of the Dutch company for almost 70 years. The main distinguishing feature of Koni shock absorbers is the ability to adjust the stiffness parameters, adapting the car both to external conditions and to the individual characteristics of the driver and the manner of driving the car.
But are all major manufacturers of shock absorbers widely represented on the Russian market? The figure below shows the top six players in this market in the US according to a survey by Ranker.
The first three consists of participants in the Russian rating. But the products of the American fox racing and Swedish Ohlins specific - it is designed for motorcycles, ATVs and SUVs. American Rancho Suspension in Russia is quite well-known and specializes in the supply of products for pickups and large SUVs popular in the USA. A few years ago, Rancho was acquired by Tenneco, which in turn owns the Monroe trademark.
Thus, the first three manufacturers of shock absorbers with a high reputation for Russia are KYB, Monroe And Bilstein.
As for the objective characteristics provided by shock absorbers and affecting the safety, handling and comfort of the car, they look like the following according to the manufacturers themselves.
Braking distance at a speed of 40 km / h:
- Bilstein - 8.0 meters;
- Monroe - 8.5 meters;
- KYB - 9.0 meters.
The differences are quite significant, if you remember that in a critical situation, centimeters of stopping distance are important.
Rear axle drift 90° (tight turn mode):
- Bilstein - 59 km / h;
- Monroe - 52 km / h;
- KYB - 48 km / h.
Tests for smoothness (characteristics closely related to subjective comfort) and directional stability are carried out in relation to each specific car model, therefore, it is possible to compare shock absorbers from different manufacturers only for specific cars.
Interestingly, such tests sometimes give paradoxical results: venerable firms can lose out to outsiders, both in individual indicators and in aggregate test results.
And yet, which shock absorbers to choose? Given the variety of designs, a wide range of loads and significant differences in the characteristics of different models of cars, as well as individual characteristics of the driving style, one should not expect monosyllabic answers to this question.
It is necessary to rely, first of all, on the recommendations of the car manufacturer, both in terms of characteristics and in terms of shock absorber manufacturers. If the owner wants to change the dynamics of the car due to shock absorbers (or there is no way to follow the manufacturer's recommendations exactly), general considerations on how to choose shock absorbers for a car can be formulated as follows:
Selection by type (oil, gas, gas-oil):
- For those who prefer comfort, a quiet ride, reliability and affordable prices, two-pipe oil shock absorbers are suitable;
- If you want comfort requirements combined with improved cornering dynamics, and the cost and reliability of the part are in a reasonable range, then twin-tube gas-oil shock absorbers are the right choice;
- Single-tube gas shock absorbers are designed for aggressive driving enthusiasts who prefer the handling of the car to a smooth ride.
By the way, the age of the car is also an important factor in making a decision. It is hardly advisable to install expensive gas shock absorbers on cars of venerable age with high mileage: the elastic characteristics of the suspension and body strength indicators deteriorate over time, and instead of the expected one, you can get the opposite effect.
Choice by manufacturer (which company shock absorbers are better):
- If the car belongs to the budget segment, and there is no need to test it in sports modes, and funds for maintenance are limited, shock absorbers from the Russian company SAAZ or the Belarusian Fenox may well be suitable;
- Those who appreciate quality and are ready to pay for it (even if the car does not belong to expensive foreign cars) should pay attention to the products of KYB, Monroe and Boge (Sachs);
- The products of Bilstein and KONI (the aristocrats in the world of shock absorbers) are recommended by experts for both sports driving enthusiasts and owners of premium cars.
And, of course, you need to beware of fakes: if the price for Bilstein products in the store is the same as for the Belarusian Fenox, then something is wrong with such a seller (and not with respect to Fenox). And the recipe for verification is the presence of a certificate of conformity, a warranty card and the correspondence of a unique serial number to the data on the official website of the manufacturer.
Differences between gas, gas-oil and oil shock absorbers, their pros and cons
A shock absorber is a mandatory and extremely important component in the suspension of any vehicle, without which it is almost impossible to imagine a controlled ride. Its main purpose is to reduce the number of "reductions" in the springs that support the body, and make the movement of the car over any obstacles smoother and softer.
Despite their sufficient range available on the market today, the question of which shock absorbers is better is still relevant for most car owners. All existing types are divided into two main groups - oil (hydraulic) and gas, or gas-filled. The question of which shock absorbers is better - gas or oil, is asked by almost any motorist when the time comes to "reinstall" them.
What is a shock absorber for?
Any shock absorber, regardless of design, is located between the body and the suspension and acts as a damper. Despite the presence of springs or springs, "alone" they are not able to quickly and effectively dampen the vibrations and shaking that occur during the movement of the car. The reason for this is the one-way orientation of the springs. The installed shock absorber works in the opposite direction to the spring, which ensures the effective operation of the entire suspension.
Any of them, structurally, is a cylinder, inside of which a piston is located, equipped with check valves of various sections. Thus, the necessary mode of operation of the device is achieved - good and smooth compression of the shock absorber and its difficult stretching. Depending on the type of device, the damping chambers can be filled with gas or oil, and it is they who are responsible for the smooth movement of the car over various irregularities, damping strong body vibrations.
Oil shock absorbers - design flaws
Most new cars are equipped with oil shock absorbers. Their design consists of the cylinder itself, the piston moving along the guide bushing and the working fluid - a special oil. All vibrations that occur when the car is moving and that have a destructive effect on the springs are damped due to the resistance of the oil compressed by the piston. The simplicity and sufficient reliability of the device made them the most common on the market. However, before choosing this type of device, it is worth knowing about the existing shortcomings.
According to auto experts, the main negative point that prevents maximum efficiency in work is the presence of air inside the device. In the event that its insufficient or excessive content is noted, the operation of the device becomes defective. Such a shock absorber is easily compressed and unclenched from a relatively small effort, which will certainly affect the handling of the car and the comfort of being in it.
The undoubted disadvantage of oil samples was their extremely low heat transfer, which provokes their rapid overheating when the car is moving. Prolonged use of such shock absorbers causes the oil to lose its original properties due to constant heating. As a result, the initial softness of the ride is quite noticeably lost, which inevitably affects the functioning of the entire chassis of the car. This is especially noticeable in the summer.
When wondering which shock absorber to choose - gas or oil, it must be taken into account that the latter has one feature that manifests itself when driving on broken, poor-quality roads. The frequent stroke of the piston provokes foaming of the oil in the shock absorber and the loss of the required viscosity. The result of this will inevitably be felt not only by passengers in the cabin, but also by springs working with an increased load, for which they are simply not designed. As a result, the likelihood of accidents increases, there are violations in the operation of the brake system and premature wear of rubber.
Advantages of hydraulic shock absorbers
Despite a sufficient number of negative points, the use of oil shock absorbers also has certain advantages, of which the affordable cost is not in last place. In addition, a lot depends on the driving style. The more aggressive the driving style, the faster not only the shock absorbers wear out, but also the rest of the suspension elements. The high-speed overcoming of various obstacles, especially deep pits, is especially harmful to the chassis.
Oil shock absorbers can last much longer with basic maintenance, which is often simply not there. For example, periodic checks of the condition of the chassis at the service will help to avoid subsequent and costly repairs. Yes, and periodic treatment of seals on shock absorbers with inexpensive silicone grease will also increase their service life. The brand also matters - as practice shows, shock absorbers of well-known brands are much more successful than cheap ones, on the occasion of purchased mechanisms.
Gas models - ideal for bad roads
Gas shock absorbers are much better adapted to constant use in off-road and aggressive driving. This is due to the fact that instead of oil, they use a special gas as a working mixture, which is introduced into the inside of the device under very high pressure. This ensures that the piston is constantly in a preloaded position. An important point can be considered that when driving on uneven surfaces, the change in the stiffness of the shock absorber is non-linear, which has a great effect on the controllability of the car.
In addition, it is worth noting the following advantages from the installation of gas systems:
- a sufficient degree of rigidity ensures safer movement at high speeds, minimizing the degree of longitudinal swing;
- the load on the remaining elements of the chassis is reduced;
- less tire wear, even when driving at high speeds;
- noticeable reduction in fuel consumption.
Despite a significant number of advantages, the question of which is better - a gas shock absorber or an oil shock absorber, does not imply a simple and quick answer. Installation of gas samples will undoubtedly cost several times more. The operation of a vehicle with such shock absorbers is characterized by a large impact of shock loads on the body, primarily on bearings and ball bearings - the high rigidity of these devices affects.
A frequent difficulty for the car owner is the choice - which company's shock absorbers are better to buy. This is an important point, and gas samples of well-known brands, despite the higher cost, are still more preferable.
Which shock absorbers are better oil or gas-oil
Many car owners believe that a gas-oil shock absorber is a third, separate type of device. In fact, this is the same gas. It is impossible to create a device with an exclusively gaseous medium. Gas models are, in fact, mixed media devices in which both gas and oil are present. Based on the technical characteristics, oil types should be more rigid, since the compensation fluid is practically not compressible. In practice, everything turns out to be exactly the opposite.
It's all about the factory settings of the device itself, its size and other design features. Before choosing shock absorbers for a car, you should familiarize yourself with the recommendations of the manufacturer of a particular vehicle. This is due to the fact that the suspension of the car is carefully calculated, and standard shock absorbers fully comply with all the necessary requirements for a particular modification of the car.
The installation of any even the most expensive mechanism with other characteristics, as a rule, leads to an increase in the load on the chassis. If it is necessary to replace standard devices, you should purchase models with identical or similar characteristics, and which shock absorber is better - oil or gas-oil, is up to the owner of the car to decide. If the car is used more off-road, you can install softer samples, but if the car is used on good surfaces, it is acceptable to install more rigid models.
Replacing shock absorbers - is it really necessary?
Naturally, new devices have a factory warranty. In order not to lose the opportunity to use it, they should be purchased in well-known stores, and the purchase process should be accompanied by a verification of certificates - regardless of which company's shock absorbers are purchased. In addition, they change in pairs, the only way to save the right to exchange a low-quality product.
According to statistics, about 45% of cars require replacement of shock absorbers. At the same time, gas models should not be preferred if the car is not new - over time, the body loses its original rigidity, and the installation of gas systems is impractical due to their greater rigidity. High-quality models, both oil and gas, have an average resource of about 60,000 km. True, a lot depends on the driving style and the degree of maintenance of the car as a whole. Thus, the best shock absorbers are those that meet the manufacturer's recommendations, the nature of driving and the roads that you have to travel on a daily basis.
Question " what's better”, perhaps one of the most frequently asked questions on the Internet. We, people, tend to doubt the choice of this or that product, thing, and anything ... Drivers are people too, so we have no less doubts than a simple layman. We constantly make some kind of choice, starting with the choice of a car, ending. Moreover, every day we imperceptibly make hundreds of vital decisions, for example, performing a complex maneuver, on the correct implementation of which more than one human life sometimes depends...
Structurally, a shock absorber is a cylinder with a piston, on which there are valves with different flow area and different throughput. In the case of oil shock absorbers, it passes through the valve holes, when compressed, it quickly passes through the holes, and the back valves limit the rate of fluid passage, thereby preventing the shock absorber from quickly stretching.
Shock absorbers with gas chambers are called gas shock absorbers. In gas shock absorbers, there is only one cylinder, in which the pressure is approximately 25 bar. The floating piston separates the gas from the oil, preventing them from mixing, due to this high gas pressure, the oil is not able to foam. As a damping element in gas shock absorbers, the same chambers are used, only instead they use a special gas. According to a non-linear law, the stiffness of a gas shock absorber increases with tension or compression, which, by the way, is not typical for oil shock absorbers.
The main differences between gas-oil shock absorbers
We have already figured out how gas and oil shock absorbers work and what they consist of, the question remains - what kind of "such a beast" gas-oil shock absorber. In a nutshell, the gas-oil shock absorber is a kind of compromise between gas and oil shock absorbers. The gas-oil shock absorber has almost the same design as the oil shock absorber, it also consists of two cylinders. The upper part is filled with nitrogen, the cylinder itself is under a pressure of 2.5-5 bar, which increases the effectiveness of the shock absorbers. The principle is as follows - the higher the gas pressure on the oil, the faster the response of the shock absorbers, while the car's suspension will be stiffer.
Summing up
Oil shock absorbers softer, since they use only oil, which, like all liquids, is almost not subject to compression, as a result, the stroke, as well as the shock absorber force, will directly depend on the check valves in the piston of the shock absorber cylinder. In terms of travel, the oil damper will be softer and more energetic.
Gas shock absorbers can be called more rigid, since the second working medium of the shock absorber is gas, which itself is able to compress, despite the fact that it is under high pressure. As a result, the gas will also take part in softening the ride of the car and the force on the shock absorber rod. All this makes the shock absorber more rigid and less inertial in relation to the movement of the rod. The main "chip" of the gas shock absorber is its ability to change the stiffness properties depending on the road, by means of a gas chamber, which dampens vibrations due to its non-linearity during operation. The gas shock absorber is less soft and less elastic, therefore, during the passage of uneven sections, the suspension with gas shock absorbers can seem very stiff and extremely uncomfortable. However, rigidity is at the same time a plus of this type of strut, since for a frisky ride or maneuvers, a large stroke of the rod and increased softness are simply unacceptable.
So which shock absorbers are better - gas or oil, or is it still gas-oil?
This issue is quite controversial, so it’s impossible to say for sure that this one is better, and that one is worse. Everyone must decide for himself what is more priority for him, based on what is written above. In addition, it is necessary to follow the recommendations of the automaker, it is the manufacturer who knows for sure which shock absorber can provide the necessary resistance, and a comfortable ride for passengers. Another thing is when manufacturers install shock absorbers of a "budget" sample in order to save money, but this does not suit you, in which case you can install your own version. However, those devices that you are going to install should have the parameters as close as possible in order not to disturb the driving performance of the car.
Service life and price of shock absorbers
As you know, gas shock absorbers have a more complex design, primarily due to additional damping chambers filled with gas. In addition, due to the use of seals for working with gas. For the manufacture of such devices, a more radical approach is needed, and the seals themselves must have a more rigid design.
As for the service life, it will primarily depend on the shock absorbers themselves, as well as the roads on which the vehicle will be operated. If the shock absorber is of high quality, it may well serve 60,000 km, or even more. However, if we compare resource of oil and gas devices, under equal operating conditions and quality, the oil shock absorber will last longer due to the simplicity of its design. In addition, the cost of oil shock absorbers will be about 20-30% lower compared to gas ones.
Many inexperienced drivers do not see the difference between the functions of suspension springs and shock absorbers. It seems that both those and others are designed to deal with vibrations when the wheels hit the bumps in the road. In this regard, however, an explanation needs to be made. Springs are an elastic element, their task is to absorb energy that is transmitted to the body. However, in order for the wheels to be constantly in contact with the ground, one more detail is needed: a vibration damper, which will not allow the body (and, accordingly, the wheels) to sway after each impact. It is the role of such a damper that the shock absorber plays.
Shock absorbers can have a different design and differ in the types of working fluid. Double-tube oil shock absorbers have two cylinders: an inner one, in which the piston moves, and an outer one, which is sometimes called compensation. When the wheel moves up, the working fluid is compressed, and it is displaced through the main valves in the piston into the space above it, and through the additional valves in the lower part - into the outer cylinder. On release, the reverse process occurs. The main advantage of this design is its simplicity and efficiency, while the disadvantages include the sensitivity of this type of shock absorbers to their position (installation at large angles to the vertical is not allowed) and the likelihood of foaming of the working fluid during intensive work. Frequent and rapid piston movements lead to air from the compensation cylinder entering the liquid, as a result of which the damping characteristics deteriorate.
To avoid foaming, gas under low pressure was used in twin-tube shock absorbers instead of air. Such shock absorbers are called gas-oil. They, as well as hydraulic ones, cannot be installed “upside down” - the gas must be in the upper part.
But another type of shock absorbers is indifferent to orientation. These are single-tube structures - as the name implies, such a shock absorber has only one cylinder, one cavity. However, it is separated not only by the main piston, but also by an additional, floating one, behind which there is gas under high pressure (about 20 bar). If in a gas-oil double-tube shock absorber gas actually plays the role of a backwater, preventing the oil from foaming, then here it is directly involved in damping vibrations. Moreover, since, unlike a liquid, gas is still compressible, its damping characteristic is nonlinear: with significant piston movements, the shock absorber stiffness will be higher. Such shock absorbers are often called gas shock absorbers, although oil is also present in them, therefore, strictly speaking, it would be correct to call them gas-oil single-tube shock absorbers.
In motorsport, special shock absorbers are used, which have an additional remote reservoir. This solution allows you to increase the total volume of the working fluid and improve its cooling (which is important given the driving to the limit). Note that in normal "civilian" conditions, the use of sports shock absorbers with remote reservoirs does not provide tangible advantages.
Separately, it is worth highlighting expensive adaptive shock absorbers, which, for obvious reasons, have become widespread in premium class cars. They provide the ability to quickly change the characteristics while driving. Such shock absorbers can be electronically controlled (by a signal from the control unit, the resistance of the electric valves changes) or magnetically adjustable. In the latter case, the working fluid contains magnetic particles, and the piston is an electromagnet, which is again controlled by an electronic "brain". By changing the characteristics of the magnetic field, it is possible to change the viscosity of the liquid, and, therefore, the characteristics of the shock absorber. The response time of the electromagnet to the commands of the control unit is about 10 ms, therefore, it can be said that the change in characteristics can occur instantly. The suspension really gets adaptive properties, that is, it automatically adjusts to the current road surface. The disadvantage of controlled shock absorbers is, of course, their price.
Now that we have introduced you to all the main types of shock absorbers, it's time to ask yourself: so which ones to choose for your own car? The choice of shock absorbers is determined by the pros and cons of each design. The easiest option is hydraulic (oil). They are reliable, not afraid of minor damage to the outer case and provide acceptable comfort. However, if you often drive on rough roads, or simply prefer an active driving style, oil shock absorbers are contraindicated for you due to the tendency to foam already discussed above. Gas-oil systems are largely free from this drawback: the gas props up the oil, preventing the formation of bubbles in it. Among the disadvantages of this type of struts, we note the linear damping characteristic: the suspension will be equally soft (or hard) on any surface. But gas single-tube shock absorbers provide not only more efficient shock absorption, both on smooth asphalt and on uneven roads, but also more reliable contact of the wheels with the surface. If handling is important to you, the stability of the car in corners - choose gas. Of course, they will cost you more than oil ones, but the result will be worth it. Gas also has its drawbacks, the main of which is failure if the hull is damaged. However, this rarely happens.
Whatever the design of shock absorbers, their service life largely depends on operating conditions and, first of all, on workloads. In order to extend the life of not only shock absorbers, but also most suspension parts, we recommend using one of the effective and safe tuning methods: or the rear suspension.
