Very rarely, motorists pay due attention to spark plugs, even when carrying out Maintenance. Only in the event of a breakdown, suspicion falls immediately on the candles. After several attempts to bring old candles to life, car owners come to the conclusion that they need to be replaced. Then the question arises, which spark plugs are better?

Spark plugs are usually chosen based on two main parameters: glow number and the size of the candle itself. Which candles are suitable for a particular car engine is usually indicated in the owner's manual. And to carry out the selection of candles is only according to the documentation for your car. In terms of geometric dimensions, everything is usually clear. A candle of the wrong small or large size simply will not fall into place. seat, and if it is short, then the electrodes will not reach the combustion chamber, and detonation of the fuel and air mixture will not occur. Of all the brands of candles, it is best to choose those whose cost is at an average level.

Be sure to watch the video:

You should stop at the second parameter - the glow number. Many do not know what it means, and the glow number is a parameter responsible for temperature regime spark plug operation. The higher this parameter, the higher temperatures the candle can operate. Thus, you can understand which spark plugs are better. For example, in sports engines or racing cars it is necessary to install candles only with the highest glow number. Very often such cars work on increased speed, also the engine power in sports cars is much greater than in conventional cars. Therefore, when buying such a car, it is best to choose the appropriate spark plugs.

Spark plugs are as follows:

• Spark plugs with one electrode.
• Spark plugs are multi-electrode.
• Candles in designs dominated by precious metals.

Candles with one electrode

These spark plugs are the most common variant of this product. The most popular Japanese single-electrode candles. They have a simple design, so they are not overpriced. The upper part of the candle is made of ceramic, and at the bottom there is a metal body with a thread, thanks to which the candle is screwed into the body without much effort. To improve contact, the candle must be tightened with a special key.

Two electrodes provide the ignition spark. Both the center and ground electrodes are usually the same size (2.5 mm), but some manufacturers prefer to make them different. If the side or main electrode is a little thinner, this will create a better spark and increase motor power. Since the production of the first single-electrode spark plugs, changes have only been made to the diameter and length of the lower metal part. The material from which the electrodes are made has also changed, now they are usually made of copper.

Single-electrode spark plugs are the most economical option, as their prices are very affordable. But even the most expensive brand of such a candle has a short service life and cannot reveal the full potential of a car engine. Such candles are suitable for a very large number of cars.

Candles with different number of electrodes

The main quality of multi-electrode spark plugs is their long service life. This is ensured by the fact that several side electrodes are supplied to the central electrode at once. During operation, if carbon deposits appear on one of the electrodes, then the spark will spread to the neighboring one and the candle will continue to function properly. Candles with a similar design are able to provide high-quality detonation of the fuel and air mixture in the engine cylinders. Also, multi-electrode spark plugs allow the engine to develop more power. The cost of a multi-electrode car spark plug is not much higher than the cost of single-electrode spark plugs.

Spark plugs with precious metals

The last category represents a new generation of automotive spark plug products that incorporate precious materials into their construction. And now the demand is high for best candles with iridium or platinum electrodes. It is logical to clarify that the cost of such candles can be disproportionately high, but quality, reliability and long service life can be directly proportional to the price.

The main advantages of spark plugs made of expensive metals, which will help you quickly select the right products:

• Extraordinarily long service life. This is due to the fact that iridium is one of the strongest metals on earth and can withstand high temperatures. The operation of the engine, even at high speeds and for a long time, is not capable of causing harm to iridium candles.
• Improving the reliability of the engine. A correctly set gap between the electrodes and the useful qualities of precious metals allow you to normalize the operation of the motor and improve its dynamics.
• The right ignition spark can reduce fuel consumption, which creates a certain economy.

The best thin electrodes, coated with a thin layer of iridium or platinum, provide a spark of such power that ordinary automotive spark plugs cannot match. Platinum and iridium, among metals, have the longest service life. Also, electrodes made of such metals are capable of self-cleaning. A spark that occurs on the side of the main electrode removes all carbon deposits, which increases the life of such a spark plug by several times.

How to make a choice

In order to decide and find out which spark plugs are better and choose the most suitable ones, you first need to find out what requirements are placed on candles for your car. You should not put expensive candles made from an alloy of iridium and platinum in Soviet cars. In old engines, such candles will not bring the expected result, and at a price they will cost as much as a third of the motor. Most inexpensive brands of candles are better suited for domestic manufacturer. The choice can stop on both single-electrode and multi-electrode candles. But if the car is sports, with a large engine, then the choice should be stopped on candles with the addition of precious metals.

question which spark plugs are best, not only novice motorists are asked, but also car owners with a long driving experience.

Spark plug

A device designed to ignite combustible mixture (gasoline, gas) in automobile engines is called a spark plug or ignition, which, in fact, is the same thing.

The spark supplied by the device to the fuel chamber leads to a mini-explosion, which, in turn, pushes the motor pistons, and they through the gearbox and drive ( transmission elements) give the car motion.

A set of candles can consist of 2, 4, 6 and 8 devices, depending on how many cylinders the car engine has. For example, a two-cylinder Oka requires a set of 2 spark plugs.

Four-piston cars common among the population ( "Lada" and other models) have 4 glow plugs respectively. More powerful engines involve the use of sets of 6, 8 devices.

Attention! It is not recommended to replace glow plugs by the piece.

The kit should be changed immediately, since the same material and quality of spark plugs are required for smooth operation.

The main elements of a classic two-electrode spark plug:

• frame;
• insulator;
• central electrode;
• contact rod.

The design idea is the use of two electrodes, between which a spark jumps, igniting the combustible mixture, increases the service life and reliability of the devices. However, the electrodes still burn out over time.

A multi-electrode spark plug, in which the spark itself makes a choice regarding the side electrode, which has this moment the least resistance, has a large resource and reliability, but also cost.

heat number

Answering the question which spark plugs are best suited for this or that car engine, it should be noted: a competent choice of devices determines the characteristics. When buying kits, first of all, you need to pay attention to such the most important characteristic glow plugs, as the glow number of devices.

This indicator determines the thermal properties of the glow plugs and is the temperature indicator of the lower part of the insulator of the central electrode of the devices.

For domestic devices glow number of spark plugs is determined on a single-chamber installation specially designed for this process, equipped with pressurization.

The boost pressure indicator increases until a reaction called glow ignition begins - uncontrolled ignition of the combustible mixture directly from the hot elements of the devices.

In the process, the average indicator pressure of the cycle, which is called the glow number, is calculated and fixed.

Attention! The value of 9000 °C is the maximum temperature limit that affects the occurrence of glow ignition. An indicator of 4000 ° C is the minimum temperature value at which the process of self-cleaning devices from carbon deposits starts.

Regarding these characteristics, glow plugs are divided into:

1. "cold" with a high glow number, installed on highly accelerated engines;
2. "hot" with a low glow number, installed on low-powered car engines.

The interchangeability of candles by glow number from different manufacturers is carried out according to special tables.

Spark plug marking

If you have any difficulties regarding the search for tables that help determine the incandescent number of devices from a particular manufacturer, you should pay attention when buying to spark plug label indicated directly on the products themselves.

On devices domestic production there is a corresponding marking, where the numbers indicate the value of the glow number:

• 11 – 14 ("hot" candles);
• 17 – 19 ("medium" candles);
• an indicator of 20 and above - "cold" candles;
• value from 11 to 20 on the device - unified candles.

In the recent past, on the products of some foreign companies, the thermal characteristics of devices were indicated by time - in seconds, after which glow ignition occurred.

These values ​​exceed domestic indicators by about 10 times. At the moment, foreign companies that manufacture glow plugs use the conventional value of the glow number in the marking.

Can spark plugs of the same specification be used for gas and petrol?

Such characteristics of prechamber devices affect:

• for a significant increase in speed;
• complete or better burnout of the combustible mixture;
• increase in engine power indicators;
• decrease in the value of toxicity of exhaust gases.

When choosing devices, one should not forget about such a fact as the individual characteristics of the engines. They have a number of features, which, in turn, affect the answer to the question, which spark plugs are best for a particular car model.

As a rule, these features can be detected only during the operation of the car for a certain amount of time. After analyzing the functioning, you can proceed to the selection of the optimal glow plugs.

The winter period creates a series of difficult tests for motorists. Poor traction and reduced visibility during snowfalls are accompanied by intermittent problems starting the engine and malfunctioning of key systems. Only a well-trained driver can challenge the elements and adequately withstand their pressure. In this article, we will pay attention to spark plugs, consider in detail their varieties and select the best option for winter.

Hot candles are more reliable in winter

For a successful start of the engine with low temperatures you need a good fuel mixture and a good spark. Provided that the remaining systems are in good condition, these two factors will ensure stable operation of the motor in all weather conditions. Cold air has a much lower electrical conductivity, so it is better to use hot spark plugs for the winter. They are distinguished by greater intensity and stability of the electric field in the zone of spark occurrence. The improvement of this indicator is achieved by changing the central electrode. For its manufacture, various materials are used, which, together with optimal heat dissipation, stabilize sparking in the cold.

Types of candles by electrode material

The material from which the electrode is made is considered one of the key parameters affecting the quality of the spark. The design of modern candles uses electrodes made from the following raw materials:

• Nickel and copper- The most common a budget option. The average resource is 25 thousand km. In combination with a weak battery and soot on the surface in winter, nickel or copper candles make starting the engine much more difficult. The problems lie in the large thickness of the electrodes, which cannot be reduced by the sensitivity of the material to thermal loads.
• Platinum— differs in the long operational period and reliability. The resource is about 50 thousand km. Resistance to temperature changes allows you to reduce the thickness of the rod, increasing the efficiency of platinum candles in winter.
• Iridium creates ideal uninterrupted sparking under any conditions. With a minimum core thickness, iridium spark plugs will last at least 100 thousand km. Among the favorites for domestic market DENSO TT series products.

What candles to put on the winter?

On the winter period it is better to put platinum or iridium models made using advanced sparking technology. Not less than important parameter when choosing, the glow number (KN) is a thermal characteristic that determines the moment of involuntary ignition of the mixture from a hot surface (heat ignition). Depending on its size, there are 3 types of candles:

• hot: up to 14;
• average: 15-19;
• cold: from 20.

Why does he pour candles in winter?

The reason for pouring candles in winter lies in the low temperature, when cold fuel does not mix well with air. A sufficiently powerful spark is required to ignite a supercooled mixture. If for any reason a weak spark occurs, the candles will be flooded. To resume the operation of the system, you need to dry them and properly calibrate the gap. In more detail about why candles are poured in winter and how to deal with it yourself, you can find out in our next publications.

IXORA hypermarket presents big choice spark plugs from various manufacturers: DENSO, Bosch, NGK, etc. Call us and qualified experts will help you choose the best model for the winter, taking into account the modification and type of engine.

New Denso spark plugs Iridium TT available for order are presented in the table:

Manufacturer	the name of detail	vendor code
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug
	Spark plug

During the operation of the car, each car owner will invariably need to replace spark plugs. How to choose the right candles, which at the same time should be distinguished by reliability, durability and affordable cost. We will tell you in more detail how to choose spark plugs for your car.

Spark plugs in a car are used to ignite the fuel in the combustion chamber. A power discharge of tens of thousands of volts is applied to the candle, as a result, a high-voltage arc appears between the electrodes, from which the fuel ignites. Spark plugs are subject to increased stress during operation, so they need to be replaced on a regular basis. Experts recommend changing spark plugs every 100,000 kilometers, which will ensure excellent power performance and reduced fuel consumption. Also, candles are an indicator of the state of the engine, and if any foreign deposits appear on the electrodes, appropriate diagnostics and engine repairs should be performed.

By the condition of the spark plugs, you can judge the existing problems with the engine. So, for example, if the electrode is covered with black soot, this indicates an enriched fuel-air mixture. As a rule, such engines have an increased fuel consumption in parallel. But if there is a light gray or white soot on the electrode, then the motor runs on a lean mixture, which can lead to overheating of the combustion chamber.

If there is a small skirt with a reddish tint on the central electrode, then this indicates a high content of various additives in the fuel. As a rule, such deposits are also noted inside the engine. Accordingly, it will be necessary to clean the motor using ultrasound and special injector cleaners.

If there are oil smudges on the spark plugs, this indicates increased consumption oil and problems with valve stem seals. Such an engine has a bluish color of the exhaust and a characteristic smell in the exhaust gases.

Currently, in specialized auto parts stores, you can find candles with one or more electrodes, as well as those made of iridium and platinum.

Single electrode candles They are simple in design, have a white ceramic body and a threaded metal insert. The spark is produced by two electrodes, lateral and central. Such candles have been produced for many decades, they are popular, but they also have certain disadvantages. First of all, this is a short service life, so there are often situations when, after 20-30 thousand kilometers, it is necessary to change the spark plugs.

Multi-electrode candles can have 3-4 side and one central electrode. This design provides a high-quality spark, while such candles have a long service life. The only disadvantage of such multi-electrode spark plugs is their high cost.

Also on sale you can find options for such spark plugs, which are made of conventional metal alloys, as well as noble metals. Initially, they were used exclusively in motorsport, but today they are also used in the civilian world. A feature of these plugs is their ultra-thin electrodes, which can withstand high temperatures without degrading the quality of the spark and ignition of the mixture, even at increased engine loads.

Iridium candles, which belong to the new generation and have the highest possible melting point, are also very popular. Iridium is an extremely hard, corrosion-resistant metal that is used to make spark plug electrodes, which not only provide good combustion, but also have a long service life.

All candles used today have a glow number indicator. This number indicates the degree of accumulation of heat by the candle. The higher this number, the colder the candle is considered, and the longer it keeps its performance characteristics. Experts recommend giving preference to spark plugs with a high glow number, which will ensure high-quality fuel combustion and provide optimal engine power.

On sale today you can find spark plugs from various manufacturers. The most popular products today are from the German company Bosch, which combines quality and durability. Bosch produces these spark plugs for different cars, which differ in their design and incandescent number. We do not recommend you save on the quality of purchased spark plugs, but give preference only to well-proven models from leading manufacturers, which will ensure trouble-free operation of the engine.

Conclusion

Right choice of the spark plugs used will allow you to guarantee trouble-free operation of the engine, reduced fuel consumption and excellent engine power characteristics. It is necessary to choose candles depending on their design, electrode material, as well as on the glow number indicator. We recommend that you purchase these spark plugs from leading manufacturers to ensure their durability and resistance to high temperatures.

The modern auto parts market offers car owners a wide range of products from various manufacturers that are not directly related to well-known auto concerns. Even such an ordinary thing as a spark plug, designed to ignite the fuel-air mixture, is produced under the auspices of special companies. This is primarily due to the high cost of branded products. The presence of the logo of the auto concern on the candle automatically adds from 20 to 50% to its final cost. Therefore, a natural question arises before users: is it possible to buy high-quality candles at a low price, produced under the auspices of "non-promoted" companies?

Of course you can! And in order to confirm the statement made, we have selected worthy options and ranked the best spark plugs in several categories. The distribution of goods by place was based on the following criteria:

1. reviews of motorists about the experience of use;
2. opinion of authoritative publications, professionals and experts;
3. performance comparison;
4. value for money products.

The control group was taken as a line of manufactured domestic cars VAZ and similar platform products of the Renault-Nissan concern.

Best Inexpensive Single Electrode Spark Plugs

3 Denso W20EPR-U

Cheapest single electrode spark plug
Country: Japan
Average price: 130 rubles.
Rating (2019): 4.8

Denso W20EPR-U is positioned as a standard spark plug designed for use in engines of LADA, Chevrolet, Nissan and Daewoo vehicles. It contains several interesting design solutions at once, thanks to which it opens up new facets in working with stock engines. First, it should be noted the original shape of the ground electrode with a U-shaped groove. This decision made it possible to slightly increase the area of ​​flame propagation from a spark, increasing the completeness of combustion of the air-fuel mixture and reducing emissions (by an average of 3.1% compared to EZ candles). Secondly, the core of the central electrode was replaced from solid nickel to copper, which made it possible to slightly increase the power of the engine, as well as slow down the wear of the side electrode. However, it is worth recognizing that the working life of the Denso W20EPR-U (even despite the improvements) turned out to be not the largest - at best, such a candle is enough for 30 thousand kilometers.

2 Champion RN9 YCC

Extended spark plug life. Small boost in engine power
Country: USA
Average price: 177 rubles.
Rating (2019): 4.8

At first glance, Champion RN9 YCC is a typical candle, of which there are a great many on the market. Due to its low cost, it is installed mainly on cars of the VAZ concern - from 2106 to 2115. However, owners of Korean and Japanese cars (Hyundai, Honda, Toyota) also often show interest in this model.

The main advantage of these candles is the original approach to the manufacture of electrodes. For better heat dissipation in the spark burning zone, the developers focused on the electrode core, making it copper. Such a measure made it possible to significantly reduce the temperature at the side electrode, while at the same time increasing the service life of the plug by 2 times. In addition, the positive aspects of the point improvement also affected the power parameters: bench measurements registered, albeit insignificant, but an increase in engine power: by about 1.2-1.4%.

1 Bosch WR7DP

High performance at low cost
Country: Germany
Average price: 184 rubles.
Rating (2019): 4.9

Unique, in terms of the design of the central electrode, a candle. The thin core is made almost flush with the ceramic insulator, due to which the spark takes on the appearance of a plasma discharge. This discharge is stable even at low voltage in the car's on-board network. When working on high-quality fuel, the resource of one candle is almost 55-60 thousand kilometers - this indicator is achieved due to platinum plating. However, domestic roads do not recognize precious metals. In Russian realities, Bosch WR7DP candles burn out much faster. They are installed mainly on foreign cars, such as Chevrolet, Hyundai, Nissan, etc. The price is above average, but iridium counterparts are much more expensive.

Advantages:

• innovative design of the central electrode;
• a spark of a kind of plasma arc;
• attractive price;
• stable operation at low battery voltage;
• the presence of modifications for cars VAZ, Renault, Chevrolet, etc.

Flaws:

• fuel consumption is slightly higher than when using regular (saving) spark plugs.

The best premium single electrode spark plugs

2 NGK BKR6EIX

Best durability performance
Country: Japan
Average price: 606 rubles.
Rating (2019): 4.8

Iridium spark plug with long working life. According to numerous users, one set is enough for an average of 50 thousand kilometers, however, when using high-quality high-octane fuel, this figure can increase to 60-65 thousand kilometers. In terms of fuel economy, there is no particular difference with inexpensive candles, however, the economic factor is expressed by working out the entire period of the declared operation. The cost is high, due to the iridium coating applied to the central and only side electrode. The best option for drivers of German (BMW, Audi, Volkswagen), American (Ford, Chevrolet, Chrysler) and Japanese (Lexus, Toyota, Mazda, Honda) cars ) brands that are very interested in stable engine performance.

Advantages:

• widespread;
• long service life (about 50 thousand kilometers);
• iridium coating;
• stable spark;
• high nominal quality.

Flaws:

• high cost offset by quality and durability.

1 Denso PK20PR-P8

High reliability (iridium sputtering of electrodes)
Country: Japan
Average price: 455 rubles.
Rating (2019): 4.9

Very common candles among owners of cars of the Nissan B platform (Renault, Nissan, VAZ). They liked it for a high indicator of a working resource (about 40 thousand kilometers on fuel of not the highest class) and for the corresponding low cost. In terms of quality, Denso PK20PR-P8 is also all right: Japanese manufacturers, as they say, did a great job on platinum coating and electrode geometry. The only problem during operation can be a small interelectrode gap, made so for the sake of sparking even at low mains voltage. Nevertheless, motorists are not at all embarrassed to purchase these candles, fortunately, in the vast majority of cases, the purchase becomes completely justified.

Advantages:

• acceptable working resource;
• good quality electrode coating;
• the presence of typical iridium analogues (more expensive, but more resistant).

Flaws:

• insufficient, based on regulatory requirements, the interelectrode gap for Renault cars and the like (0.8 mm).

The best spark plugs with two electrodes

4 Renault 77-00-500-168

The best branded candle with two side electrodes
The country: France (made in Japan)
Average price: 210 rubles.
Rating (2019): 4.7

The product of the French company Eyqiem is officially supplied to the Renault plant to complete the K7M engines. It has a standard spark plug design, but provides a slightly longer center electrode projection to ignite as much of the air-fuel mixture as possible. Two side electrodes significantly increase the working life of the candle, taking the discharge alternately, giving each other time to remove and dissipate heat.

Since the main desire of the developers in the manufacture of Renault 77-00-500-168 candles was to ensure maximum stability of work, economic and power indicators receded into the background. The candle does not give a large increase in power in relation to single-electrode models, does not carry fuel economy, but can be operated up to 40-50 thousand kilometers.

3 Bosch FR7LDC+

High degree of reliability
The country:
Average price: 180 rubles.
Rating (2019): 4.8

A candle with a high degree of reliability, very popular in Russia (used in VAZ, Audi, Chevrolet, Mercedes, etc.). The basis for the success of Bosch FR7LDC + is a non-trivial approach to the manufacture of the electrode part. No, it's far from the geometry and arrangement of the electrodes relative to each other - everything is done in best traditions candle production. The main nuance lies entirely in the variety of materials used. The central electrode of the spark plug is alloyed with yttrium, a rare earth metal that significantly increases the stability of the work. In addition, the core of this electrode is made of copper with an anti-corrosion chromium-nickel coating. This combination not only protects the metal from corrosion, but also ensures efficient heat dissipation in the spark burning zone. As a result, we get a reliable and efficient candle, the resource of which (at maximum return) is enough for 50-60 thousand kilometers.

2 NGK BKR6EK

Excellent power increase (on average 1.5% compared to single-electrode plugs)
The country: Japan (made in France)
Average price: 230 rubles.
Rating (2019): 4.9

A very good candle of the V-Line series, which has a V-shaped groove on the central and a slight rounding on the two side electrodes. Possesses best time detonation and effective ignition of the fuel mixture, which, in turn, causes a slight forcing of the engine (an increase in power by 1.3-1.8% exceeds that when installing standard single-electrode candles). Among other things, NGK BKR6EK provides more complete combustion of fuel, thereby positively affecting the overall efficiency of the engine.

The main irony of these candles lies in the fact that, made in Japan, they are not used in Japanese cars. Most often, these kits can be found in cars of the brand "LADA", "Audi", "BMW" and "Skoda", which clearly demonstrates the company's focus on the European segment.

1 Denso K20TXR

The best combination of price and quality
Country: Japan
Average price: 250 rubles.
Rating (2019): 4.9

Two-electrode spark plugs from a Japanese manufacturer are one of the most successful options for completing the engines of the Nissan B auto platform (LADA, Nissan, Chevrolet, Renault). No "jambs" in the work (if it is original candles, and not fakes): no stamping defects, no distortions when soldering electrodes. Exactly high quality manufacturing ensures the duration of operation (up to 40 thousand kilometers - the resource is highly dependent on fuel) and the stability of the spark supply. Traditional and less expensive (compared to iridium and platinum) nickel-plated electrodes give the latter resistance to combined exposure negative factors(soot, high temperatures and general aggressive environment). Fuel consumption is not much different from that when using regular branded candles.

Advantages:

• nickel coating increases the resistance of electrodes to aggressive environments;
• stable spark (works out ignition cycles without weakening the arc);
• regular, millimetric, gap between the side and central electrodes;
• quality manufacturing.

Flaws:

• they cost a little more than branded candles from Renault.

The best multi-electrode spark plugs

3 Brisk Premium LOR15LGS

The most original way of sparking. The best detonation of the fuel mixture
Country: Czech Republic
Average price: 700 rubles.
Rating (2019): 4.8

Brisk Premium LOR15LGS is a candle that has won fame as the most thoughtful and interesting in terms of spark formation. All four side electrodes are very low relative to the central one, which creates a very long spark that slides along the ceramic insulator. This principle allows you to significantly enhance the detonation of the mixture, but on the other hand it has one very unpleasant nuance. Sparking at low voltage with this configuration of electrodes is no good - the test in the pressure chamber clearly shows that in this component the LOR15LGS is inferior even to standard single-electrode candles.

Nevertheless, there is a good stability of the engine in all modes, and at maximum throttle, the surge of additional power turns out to be at the level of 5%. These candles are successfully run in by the owners of domestic cars, and are also often found in Japanese (Toyota, Honda, Lexus) and Korean (Hyundai, Kia) brands.

2 Bosch W7 DTC Standard Super

Good increase in fuel economy (3.2%)
The country: Germany (made in Russia)
Average price: 160 rubles.
Rating (2019): 4.9

An interesting version of spark plugs from a German manufacturer, which gives a maximum increase in fuel economy compared to single-electrode analogues. Possessing, in general, a standard structure inherent in almost all candles from Bosch, the W7 DTC Standard Super presents some very pleasant “surprises” revealed during complex tests. The pressure test carried out in the pressure chamber, the model passes perfectly, demonstrating good spark stability. At maximum throttling, the increase in power is not so noticeable, but there are positive trends - relative to single-electrode EZ candles, it amounted to 2.3-2.7%.

However, the Bosch W7 DTC Standard Super was most successful in the consumption component. A decrease of 3.2% is an excellent result, especially for engines that are far from the first freshness. These candles are well bought up by the owners of LADA, Chevrolet and VAG-group cars.

1 Champion N9BYC4

The best increase in engine power (up to 5%)
Country: USA
Average price: 440 rubles.
Rating (2019): 4.9

Three-electrode candle Champion N9BYC4 - the sole leader in reducing fuel consumption, as well as increasing power when throttling the engine (on average by 5-5.6%) relative to single-electrode candles. In addition, there is a noticeable improvement in the stability of work, even despite the mediocre results of the check in the pressure chamber. In general, there is nothing to highlight from the geometric features of the electrode part - against the background of various grooves, grooves and other constructs from other manufacturers, this candle looks canonical.

Champion N9BYC4 is successfully used in all running cars in Russia (from DM to representatives domestic auto industry), without any hint of falsification and other troubles. Its audience of consumers is quite large, which once again proves the legitimacy of including this model in the rating.

The best spark plugs for engines with gas equipment

3 Beru ULTRA-X79

Best price-performance ratio
Country: Germany
Average price: 600 rubles.
Rating (2019): 4.8

A spark plug with an asymmetric ground electrode arrangement: two of the four are 0.8 mm from the stem, the others are 1.2 mm apart. This is specifically designed to maintain a spark under all operating conditions and bypass potential adverse situations that arise, such as severe "smoking" of insulators. In other words, such a problem as the quality of gasoline does not in the least affect the performance of a candle, the resource of which is enough for 60 thousand kilometers (if not a fake). An additional "bonus" Beru Ultra-X 79 is the compatibility with engines on gas equipment where the highest efficiency is observed.

Advantages:

• support for operation on liquefied natural gas;
• high rates of fuel economy;
• stable spark with heavy pollution;
• acceptable price.

Flaws:

• setting the required gap between the electrodes, in accordance with the requirements of the car, is difficult;
• Open throttle has virtually no effect on power increase.

2 Denso Iridium IW20

The optimal combination of cost and quality
Country: Japan
Average price: 580 rubles.
Rating (2019): 4.9

A candle, recognized by the user of outdated technologies, but still not lost its relevance in large consumer masses. It has a thin central electrode (0.4 mm), due to which it does not live long, but it allows you to significantly save fuel and burn the mixture in the combustion chamber as much as possible. The main power inflow here (equal to 2-3%) is involved in an increase Engine efficiency by reducing misfiring and sparking rhythm. Despite the short life, the resource of the iridium tip cannot be called low: it reliably works out up to 30 thousand mileage, and, depending on the methods of operating the vehicle, is able to work beyond the appointed time.

Because of this set of small but positive nuances, Denso Iridium IW20 is often installed on cars converted to gas fuel. Thus, an already economical alternative becomes even more economical.

1 NGK LPG Line #2

The best spark plug for gas engines
Country: Japan
Average price: 860 rubles.
Rating (2019): 4.9

NGK LPG Line No. 2 is the main candle for installation on gas-equipped engines, occupying more than 90% of this market. Having entered such a specific niche, NGK began the most ambitious, comprehensive development of spark plugs, taking into account all the nuances and specifics of combustion. natural gas. This approach made it possible to find the most correct geometry of the central iridium electrode, as well as to regulate the gap between it and the side electrode with platinum surfacing.

Such heterogeneous materials were also not chosen by chance: given the different composition of the combustible mixture, as well as operating modes, the electrodes needed additional protection and stimulation of work without misfiring. In this regard, it was possible not only to maximize the volume of combustible fuel, but also to increase engine power by 3-4%. Such a model is quite expensive, but it “lives” unlike its competitors.