Selection of Denso spark plugs by car

Reliable and timely ignition of the air-fuel mixture in the cylinders is one of the decisive factors ensuring engine operation. This process is initiated by a spark resulting from electrical breakdown of the air gap between the spark plug contacts. The course of this process is largely determined by the parameters of the specified node and the system as a whole.

The engineering company DENSO is part of the Toyota Group and is one of the largest manufacturers of high-quality components for automobiles. Among other products manufactured by the company, there is an extensive range of spark plugs for gasoline engines with different parameters. These components are distinguished by high quality materials and workmanship.

The spark plug is a complex device consisting of the following parts:

contact terminal with tip;
insulator with ribs along the open part;
base with sealing washer;
central and side electrodes.

The effectiveness of this unit is largely determined by the features of its design and the physical and chemical properties of the materials used. The working parts of the spark plug are exposed to high temperature and pressure in the engine cylinders. In the manufacture of electrodes at the company's enterprises, special grades of steel with alloying additives of nickel and manganese are used.

In addition, the company produces a number of promising models of candles tipped with platinum group metals. Such products have a high cost, which is compensated by their durability and stability of parameters.

Video - how DENSO TT spark plugs differ from regular ones:

The company produces a wide range of spark plugs for almost all brands of cars. On the packaging of each product there is a list of brands of cars for which they are intended.

The technical documentation of the vehicle also contains a list of components recommended by the manufacturers. In most cases, car owners rarely independently select spark plugs for their vehicle, relying entirely on sales consultants. The latter often offer not what the buyer needs, but what needs to be sold.

You can also select DENSO spark plugs for your vehicle yourself, for which the company has created a special service on the dealer’s official website. This application allows you to reduce this process to a minimum; all you need is a computer or mobile device with Internet access.

There are pages on the Internet of other companies with similar purposes that compete with the manufacturer’s official website.

Online services that allow you to select DENSO spark plugs by car make

The range of components of this type is extensive and varied. The company's production policy is such that for the same engine several types of spark plugs can be produced, differing in design or materials used.

Examples include single- and multi-contact products, as well as components with iridium or platinum soldering. A special place in the nomenclature is occupied by plasma-prechamber spark plugs with an annular coaxial gap between the central and side electrodes. All of the listed products will work properly on power units of the same model.

The correct selection of DENSO spark plugs according to the car brand in such conditions requires good knowledge of the entire range of components of this brand. The presence of a special service on the manufacturer’s website allows you to complete this operation much faster.

Let's consider the advantages and disadvantages of online services designed to select spark plugs from a given manufacturer by car brand.

It’s logical to start with the portal of the official dealer of the Japanese company DENSO (LINK). On the main page there is a list of sections; we need to go to the electronic catalog, which has two main search forms.

The first allows you to select DENSO spark plugs by car make, and the second is designed to search by article number or other data.

The procedure for selecting the required type of components is organized as follows:

The “Select Products” window displays a list of products manufactured by this company. Click on the desired line and proceed sequentially to selecting the car manufacturer, car make and engine model, as well as the year of manufacture.
Below the search form field, a table appears indicating the code of the power unit of the period of its production, which will correspond to three types of spark plugs of different designs. The last item indicates the required number of components according to the number of cylinders.

The main advantage of this site is its simplicity of design, where the car enthusiast is not distracted by annoying advertising or other extraneous irritants. Disadvantages include the inability to place an order for the required spark plugs. In fact, the user receives only information about the spark plugs he needs, after which he is forced to search for them in order to purchase them in online stores or regular auto parts stores.

You can also use the website (LINK), which offers to purchase components in Stavropol.

The selection of DENSO spark plugs by car brand is organized here according to a very convenient scheme. The search page has a list of automakers in alphabetical order, and clicking on the link displays the results in a table.

Here, as in the first case, all three possible spark plug options for a given car model are given.

To its credit, the web page interface provides a very user-friendly comprehensive list of companies. This scheme makes it possible to quickly select the desired company and go directly to a table with ready-made data on all car models of a given manufacturer.

The somewhat complicated process of placing an order for spark plugs somewhat spoils the overall impression.

Moscow (LINK) also helps to select DENSO spark plugs for your car. The operation on this site is largely the same as the previous one.

There is also a list of auto manufacturing companies. On the next page there is an extensive table with search results for all models of this manufacturer, indicating all possible spark plug options.

The site is convenient for the buyer and allows you to quickly navigate the variety of models and quickly select the desired set of components.

One of the disadvantages of this service, as in all previous cases, is the rather complicated ordering procedure. It would be logical to place a corresponding button next to each offer to purchase it.

How to quickly and easily plot a route between cities by car and calculate the estimated fuel consumption for the trip.

We have already told you how to choose engine oil based on the make of your car.

Video - production of DENSO spark plugs at a plant in Japan:

How to correctly select Denso spark plugs for your car?

The correct operation of a car engine largely depends on the serviceability of the spark plugs (SPS) used. The range of SZ today is so huge that any consumer can choose devices for their car based on preferences and financial capabilities. How to select Denso spark plugs for a car, what these spark plugs are and what disadvantages are typical for them - read about it below.

Characteristic

Denso spark plugs, judging by the reviews of many car enthusiasts, are today one of the highest quality and most effective products for the ignition system. Among hundreds of brands, Denso is the first to patent the TwinTip technology used in the TT production line. Such devices are made with a central electrode, which is made of nickel, with a reduced diameter, in this case it is 1.5 mm. It should also be noted that the size of the side electrode has similarly been reduced to 1.5 mm. The company produces products not only for gasoline engines, but also for gas (the author of the video is the DENSO Russia channel).

We invite you to familiarize yourself with the main features characteristic of Denso SZ, regardless of what heat rating they have:

Products of this brand are characterized by improved discharge formation. If you believe the manufacturer, then in fact they achieve the greatest efficiency. It should be taken into account that the production of such products does not use precious metals, for example, iridium, and accordingly, the cost of such devices is lower. This is reflected in their final price.
The iridium or platinum NW electrodes are made of iridium or platinum, respectively. The cost of such products is higher, but their service life is truly impressive. In the first case, it ranges from 60 to 120 thousand km, depending on the thickness of the central electrode, in the second - 70-80 thousand km.
According to official data, Denso products provide improved performance at relatively low costs.
To produce a spark and start a car engine, Denso SZ requires much less voltage. This means that the power unit can be started much faster, in particular, we are talking about starting in frosty conditions.
Since Denso products have a thinner central electrode, the discharge itself will be more powerful, resulting in higher operating efficiency. This is also important in winter working conditions. As mentioned above, the electrode size is 1.5 mm, while in standard SZ it is about 2.5 mm.

Range

Now we invite you to familiarize yourself with the lines of devices produced by the Denso brand:

Nickel TT;
Iridium TT;
Standard;
Platinum Longlife;
Iridium Power;
Iridium Racing;
Iridium Tough.

Photo gallery “SZ Denso models”

Advantages and disadvantages

For a more complete picture, we also recommend that you familiarize yourself with the advantages and disadvantages of SZ. We are talking about all models, and k20tt, k16tt, w20tt, ik20 in particular. You have compiled a list of pros and cons in accordance with customer reviews, so you can be sure of the veracity of the information below.

First, let's look at the advantages:

When installing such sanitary protection systems, fewer harmful substances will be released into the environment. Due to the fact that the formation of a discharge on the electrodes of such SZ has become improved, the overall combustion process of the mixture in the engine will be more stable. Ultimately, the use of such protective equipment makes it possible to reduce fuel consumption and reduce the volume of harmful emissions into the environment. The advantage of reduced consumption is only relevant for those cars whose engines are tuned correctly and generally operate without failure . The savings themselves will be low - no more than 5%.
Large selection of devices in different price categories. This allows you to select products for any type of car.
Since spark formation has been improved, the combustion parameter of the combustible mixture also increases. This allows for ignition of even an excessively lean air-fuel mixture. Ultimately, misfires in the ignition system may continue to appear, but this will occur much less frequently.
If your vehicle is equipped with a gas cylinder installation, then you can use products from the Tough line specially designed for such engines. Devices of this model are equipped with a platinum tip, which is installed on the side electrode. It should be noted that in fact such devices have higher wear resistance, and this is especially important for gas engines. This information is confirmed by consumer reviews. It is also necessary to take into account the fact that in general the temperature of the power unit when operating on liquefied gas is higher. So if the engine runs on such fuel, the combustible mixture will burn at a higher temperature.
In addition, products from the manufacturer Denso have their own self-cleaning system. Thanks to the use of modern technologies in production, Denso produces products that, as a result of prolonged use, clean themselves. Such products are not afraid of the problem of soot, which ultimately also allows them to increase their service life.
Iridium products are more resistant to corrosion, which can significantly increase their service life, as well as the quality of work (video author Mikhail Vlasov).

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As for the minuses, they are as follows:

The first drawback is that there are many fakes on the market. As you might guess, counterfeit products will not be able to boast such advantages as the original ones, at least because the heat rating in them is different. Accordingly, the service life of such devices will also be low.
Separately, it is necessary to say regarding the service life. Judging by the reviews, in some cases it will be lower, in particular, owners of vehicles that run on gas and diesel write about this. In any case, even the reduced service life of gas SZ will still be higher than that of the same products from other manufacturers.
High price. Everyone knows that high quality comes with high cost, but not all consumers can afford such devices.
In addition, in some new spark plugs the gap itself is not adjusted to the working gap.

Marking

You can learn more about the markings, as well as the decoding of the symbols, from the table below.

Characteristics of candles

The modern market offers for sale a huge number of candles, differing in configuration, material and technical data. For each type of engine and car model, its own spare part is selected in accordance with its characteristics.

Candles are characterized by a set of the following parameters:

The number of electrodes is the number of them in the spark plug (the most common are parts with two elements).
Heat number - a parameter that determines the thermal properties of the part. The higher this number, the better it works at critically high temperatures. In accordance with this parameter, candles are:

hot - heat number from 11 to 14 (for lightly loaded engines and measured driving);
medium - value from 17 to 19 (used in most vehicles with a power of 100 hp or more);
cold - over 20 (for powerful turbocharged engines).

Spark gap - the distance from the central to the side electrode (the larger it is, the better the fuel ignites).
Material of execution - in most cases, candles are made of alloy steel with the addition of nickel and manganese. The platinum coating of the electrodes significantly increases the service life of the part, and at the same time its cost.
Dimensions such as:

thread length - there are short -12 mm, medium - 20 mm and long - 25 mm models;
thread type – the most common type found on cars is M14×1.25 (where 14 is the thread diameter, and 1.25 is the thread pitch);
hex head size - modern values are most often 16 or 21 mm.

You should choose your candle size very carefully! The short part will not fit completely into the engine socket, and the long part will protrude from it.

Selection options

We won't talk much about the choice. The choice is made in accordance with the technical parameters of a particular vehicle. When purchasing, it is important to buy the original and not a fake; we will tell you more about their differences below. Denso's official website offers a great opportunity to consumers. In accordance with the parameters entered into the form about the car, the system automatically calculates and provides the user with SZ models, the use of which is allowed in the car.

How to distinguish an original Denso from a fake?

In order not to waste money in vain, we recommend that you familiarize yourself with how to properly buy the original. Diagnostics of the purchased product can be carried out both by the appearance of the device and by its internal structure.

Naturally, when buying spark plugs, you will carry out visual diagnostics:

Inspect the product carefully. In original spark plugs, the surface of the contact terminal is more matte. As for fakes, they have a glossy surface.
Pay attention to the inscriptions indicated on the case. In counterfeit products, if necessary, the text can be removed with a fingernail or a coin, and this can be done very quickly. In original products, it is almost impossible to remove text, or at least it is much more difficult to do so.
Carefully inspect the threads of the device and the electrode. The actual quality of these structural elements in fakes is lower, this will be noticeable.
If we talk specifically about the housing of the devices, then in fake products it is not as high quality as in the originals. In particular, in this case it means that the surface of the case is not processed so well.
If you do buy a fake, then when operating the car you will notice that when driving uphill or at high speed, the engine power may decrease for no reason. But then she can also recover on her own. Accordingly, fuel consumption when using counterfeits may also be higher. The difference is not critical, but you can trace it only with accurate flow measurements.
With prolonged use, the side electrodes of the products may begin to melt. This can be monitored by periodically checking the status.

Price issue

How to distinguish a fake?

Unfortunately, counterfeit products are also found under the Denso brand, and, knowing a number of design features of the original spark plugs, they can be easily distinguished:

The contact cap must be smooth, nickel-plated. On fake candles it is rougher, sometimes oxidized (black coating)
The logo print on the insulator is applied either in small dots or with solid paint, but is always neat (no distortions, smeared paint)
The soldering on the side electrode opposite the central one is clearly different in color
The sealing washer sits tightly in place and cannot move up and down.
The model marking (alphabetic and digital code) on the already printed cardboard packaging of each candle is applied with separate stamps on different sections of the conveyor, therefore it is always offset relative to each other. In underground production, the packaging is printed in its entirety at once, with the same layout on all boxes included in the set.
On single-electrode spark plugs, the side electrode is always precisely oriented along the central one.

Denso spark plugs - selection by car

Tightening vehicle emission standards, rising fuel costs and reducing fuel consumption are leading to the fact that drivers increasingly have to pay special attention to such an important part of the car - the spark plug. Along with conventional ones, more and more often, car enthusiasts began to install modern iridium spark plugs from Denso. It is believed that iridium spark plugs:

They have a longer service life compared to conventional copper ones.
Reduce fuel consumption due to more complete combustion of the mixture.
Extend the life of the engine and increase its power.

However, when purchasing spark plugs, it is worth considering the fact that, like any part, a Denso spark plug is selected according to the car and in this case you should not neglect the manufacturer’s recommendations. We will try to understand the issues of correct selection of denso spark plugs according to the car make, installation features and types of products below.

Recommendations for selection

When choosing new spark plugs, follow these recommendations:

choose only high-quality products from trusted manufacturers;

You should not save when buying spark plugs - they are the key to stable and reliable operation of the entire engine.

do not try to buy the most expensive ones (if you are the owner of a budget car or your car has a replacement period of 30 thousand, then there is no point in buying expensive parts designed for a hundred thousand);
avoid fakes - before purchasing, carefully inspect the packaging, open it - check the markings on the part, the clarity of the threads, the quality of the coating;
Buy products only from authorized dealers or trusted stores.

What is Denso

Denso Corporation Headquarters

Today, the Denso brand has a wide range of manufactured spare parts and auto components, but the production of spark plugs is a priority for the company. It is also worth noting that the production of candles is carried out not only for cars; a recognizable brand can be found on motorcycles, garden equipment, and water boats.

Denso iridium spark plugs have the world's thinnest center electrode with a diameter of just 0.4 mm.

The latest developments of the corporation have allowed us to achieve significant results in our products. Thus, Denso iridium spark plugs contain the thinnest iridium electrode in the world - its diameter is only 0.4 mm, while they have an impressive power reserve, which allows them to be used in the most extreme conditions. Features of Denso spark plugs As mentioned above, the use of an ultra-thin electrode allows the Denso Iridium spark plug to produce a powerful spark with a lower voltage across its contacts. Another design feature of Denso includes the use of a narrowed U-shaped side electrode, which also has a beneficial effect on the formation of a spark and, as a result, the complete combustion of the fuel-air mixture. In addition, quenching resistors are installed in the spark plug housing, designed to protect the vehicle’s on-board systems from radio interference.

Iridium spark plugs Denso

The creation of iridium spark plugs made them the “face” of the company. Denso currently has several series in its assortment:

OEM spark plugs supplied to car factories have an unconventionally thick (0.7 mm) central electrode made of iridium and a side electrode coated with platinum. This is done to guarantee compliance with the declared resource of 120 thousand kilometers, although it reduces the efficiency of operation (the thickness of the electrode affects).
Iridium Power - spark plugs that have an ultra-thin (0.4 mm) central electrode, and a U-shaped groove in the side electrode. For a long time, these spark plugs were the most effective in the Denso Iridium line, until they were supplemented by new series.
Iridium Tough spark plugs are a hybrid of the previous two: a thin central electrode is combined with a platinum-coated side electrode. These spark plugs are close in service life to OEM spark plugs, but work much better on natural gas, which is gaining popularity in Europe.
SIP spark plugs are a miniature masterpiece of technology: opposite the central iridium electrode, an equally thin platinum pin is soldered onto the side electrode. This gives ideal spark stabilization, ease of ignition at high speeds and powerful boost. SIP spark plugs are the most economical among all those produced by Denso, and this effect can be felt even on a not-so-sophisticated engine. The development of SIP technology has become Iridium TT spark plugs, which still have no analogues among competitors.
Iridium Racing are designed for ultra-hard operation in engines with maximum boost levels. They do not have a side electrode at all - the spark hits directly at the edges of the skirt. There is no side electrode - there is no risk of overheating, leading to detonation, which is fatal for highly accelerated engines.

In the eternal confrontation with NGK, it is iridium spark plugs that bring Denso leadership - holding 55% of the iridium spark plug market in general, in the field of SIP spark plugs Denso is actually a market monopolist (90%).

The main advantages and disadvantages of using iridium spark plugs

Denso Spark Plug Plasma Discharge

To see a more complete picture of the use of high-tech spark plugs, you first need to understand the positive and negative aspects of installing this product on a car. The advantages include:

All the benefits of using Denso iridium spark plugs can only be felt on modern cars with high-tech engines.

Reduced fuel consumption by an average of 7%;
Reducing exhaust toxicity;
“Precious” spark plugs are not so demanding on fuel quality;
Simplified engine starting at low temperatures;
Three times the service life of Denso Iridium spark plugs compared to conventional ones.

As with any industrial product, along with advantages, there are also disadvantages. Let's consider the main ones:

The tangible effect of using iridium spark plugs can only be felt on modern cars with high-tech engines;
High cost of products. Of course, every car owner, when choosing consumables for his car, is guided by this very parameter. For example, the price of a Denso candle today is about 700-800 rubles, which is already 2800-3200 rubles for a set of 4 pieces, while a set of regular candles can be bought for 400 rubles;
The high cost of the product gives rise to another factor - the presence of counterfeits on the market.

The best manufacturers

Below are the best spark plug brands. These are the ones you should pay attention to when choosing new ones.

Denso is a Japanese manufacturer whose products are almost exact copies of the originals. Only markings will help to distinguish it. Denso iridium spark plugs are widely known for their unsurpassed reliability.
Bosch is one of the leading companies with a long history. Bosch spark plugs are distinguished by high technical characteristics and an affordable price.
NGK is another company from Japan. NLC products are distinguished by stable sparking and stable, excellent operation at high voltage.
Brisk - a Czech company produces reliable but expensive spare parts, distinguished by a special method of spark formation, which reduces fuel consumption.
Champion is an American manufacturer of quality candles at an affordable price. These products are often installed on domestic cars and budget foreign cars.

Video on choosing candles

Denso spark plugs selection by car

When carrying out maintenance of a gasoline car, along with various filters, technical fluids and drive belts, the spark plug is the same consumable item and must be periodically replaced. To make it easier to select Denso spark plugs for your vehicle, there is an online service on the manufacturer’s website. When entering the product search page, the buyer is faced with two options:

You can select a product based on the make and model of the vehicle;
According to the marking, specification and item number of the product.

Electronic catalog of the Russian-language website Denso

Replacement frequency

Different car models require different replacement intervals for spark plugs. It is always indicated by the manufacturer in the operating instructions for the vehicle.

There are a number of signs that indicate the need for replacement:

increased fuel consumption;
vibration when the engine is running;
Difficulty starting the engine.

In most cases, replacement should be made every 20-30 thousand kilometers, on many foreign cars much later. Expensive iridium and platinum spare parts can easily withstand more than one hundred thousand mileage.

Only the entire set of spark plugs should be changed! This will avoid unstable operation of the motor in the near future.

Denso spark plug markings

The range of products is very wide, so choosing denso spark plugs by car brand for the average car owner is not an easy task.

Installing "hot" spark plugs in an automobile plant is a common practice. “Cold” spark plugs are placed on forced engines for normal operation at high speeds.

Along with the overall dimensions of the product, the heat rating is considered a very important parameter for any spark plug. Depending on this indicator, candles are “hot” and “cold”. Hot - installed at the factory during vehicle assembly and are a kind of standard product. Cold ones are the same candles only with a lower heat transfer rate. They are designed to work, as a rule, on forced engines at high speeds. You can make the correct selection of Denso spark plugs using the table below. Detailed information, indicating all existing product parameters, will allow even a novice car owner to fully decipher denso spark plugs and make the right choice.

Table of designations in the marking of Denso spark plugs

Marking of Denso spark plugs

Video: Spark plugs in Japanese cars: marking of Denso, NGK spark plugs

Each manufacturer uses its own coding scheme for spark plug parameters. Denso has adopted the following for new series:

Iridium TT candles have their own scheme:

Old marking system:

For example, let's find an analogue of our classic candle A17DVRM. Here the difficulty is only with the heat number (Denso does not provide comparisons with the domestic standard), but from the catalog of analogues we can conclude that Denso’s analogue of the Russian “17” will be “20”. Since we need a 14x19 threaded shank, and the spark plug wrench we use is 21, we need to look for spark plugs with the W20 in the “old” series (since VAZ spark plugs have been replaced for decades) - for example, W20EPR-U, spark plugs with 19mm shank ( E ), center electrode protrusion ( P ), built-in resistor ( R ) and U-groove on the side ( U ). If you want to install iridium spark plugs, then IW20TT will do.

What to choose from

Today, the most popular iridium spark plugs are the products of two companies, Denso and NGK. Surely every car owner, entering a car store, will be puzzled by the question - which spark plugs are better than Denso or NGK? It is difficult to answer this question unequivocally; both manufacturers produce excellent products, value the quality of the product and their reputation. When conducting comparative tests of candles, authoritative laboratories noted that both brands have better characteristics compared to other manufacturers of similar products. Denso and NLC practically do not compete with each other - the difference in performance can be confidently attributed to the error of the measuring instruments, but some features can still be identified:

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Many automakers install Denso Iridium spark plugs on the assembly line when assembling their cars. By this sign, you can indirectly reduce the likelihood of running into a fake in your car.
It is believed that the NGK brand is more famous than Denso, and this, as a rule, is the best signal for the start of the production of famous products in underground factories.

Which is better Denso or NGK? No one has conducted reliable research on this topic. One thing is clear - you need to strictly follow the instructions of the car manufacturer.

An important aspect when purchasing any auto product is the price - Denso Iridium spark plugs in this regard are slightly cheaper than NGK.
There was information online and on specialized auto forums that:
Over the first 500 km of travel, Denso's spark gap increased.

The last two facts can be confidently attributed to clearly counterfeit products, because today this phenomenon is not uncommon. Despite all the pros and cons, each car owner chooses for himself which spark plugs are better than NLC or Denso, since it is not easy to determine the clear leader here.

Is the game worth the candle? If you type in the words Denso candles reviews in the search engine of the World Wide Web or in a conversation with experienced servicemen about reviews of Denso candles? You can come across both positive and negative experiences in using high-tech products.

Without a doubt, high quality and durability are the main criteria by which Denso iridium spark plugs can be characterized. On the one hand, the high price will scare away the average car enthusiast from buying. On the other hand, the high cost of “precious” candles can be easily justified by their triple service life compared to ordinary ones and high quality workmanship. Only an experienced mechanic or driver of an expensive foreign car with a high-tech engine can truly appreciate their benefits and effect.

Denso spark plugs: the right selection for the car

As you know, spark plugs (SPS) are an integral element of the ignition system of any car. Accordingly, if you want them to last a long time, you must approach the selection of these components with all responsibility. In this article we will talk about what Denso spark plugs are, what features they have and how selection is carried out for the car.

Features of SZ

So, if you decide to purchase Denso ik20, k20tt, w20tt, k16tt spark plugs, then before selecting them for your car, we recommend that you familiarize yourself with the features of the product. It should be noted that the Japanese brand Denso is the first to patent the TwinTip technology used in the TT line with a central nickel electrode with a reduced diameter of 1.5 mm. In addition, the size of the side electrode has also been reduced to a diameter of 1.5 mm.

So, let's move on to the features that the original iridium spark plugs Denso ik20, k20tt, w20tt, k16tt and others with different heat ratings have, in contrast to fakes:

SZ models ik20, k20tt, w20tt, k16tt and others with improved sparking actually achieve the maximum efficiency of iridium spark plugs. However, the production of such SZ requires less money, since they do not use precious materials.
According to the manufacturer, models SZ ik20, k20tt, w20tt, k16tt and others are characterized by improved performance at significantly lower costs.
Nickel TT devices ik20, k20tt, w20tt, k16tt and others require less voltage to start the power unit. Accordingly, the engine can be started much faster even at the lowest temperatures.
As a result, models ik20, k20tt, w20tt, k16tt and others have a thinned central electrode, the diameter of which is 1.5 mm (the standard one has 2.5 mm). Accordingly, the resulting spark is more powerful and its operating efficiency is higher. And this, you see, is very important, especially at low temperatures.

Range

Denso's product range includes many products with different heat ratings.

We are talking about both iridium and platinum, as well as nickel SZ:

Nickel TT;
Iridium TT;
Standard;
Platinum Longlife;
Iridium Power;
Iridium Racing;
Iridium Tauf.

Denso spark plug

Advantages and disadvantages

Below are the main advantages and disadvantages of iridium and nickel SZ models ik20, k20tt, w20tt, k16tt and others with an excellent heat rating. The information below is based on official data as well as consumer reviews.

Advantages that will allow you to select:

Reducing emissions into the atmosphere. As a result of the improved spark generation in ik20, k20tt, w20tt, k16tt and other models, the combustion process itself is more stable. Accordingly, the operation of SZ ik20, k20tt, w20tt, k16tt and other options allows to reduce fuel consumption, as well as reduce the level of CO and CH emissions into the atmosphere.
Thanks to the improved sparking of SZ with a good heat rating, the ignition index is improved. As a result, spark plugs ik20, k20tt, w20tt, k16tt and others from the Denso brand allow you to ignite even the leanest combustible mixtures. Accordingly, misfires in the system will occur much less frequently when compared with other SZ or fakes.
If you choose originals with an excellent heat rating, instead of fakes or standard SZ, then during normal operation of the sludge unit you can save five percent on fuel consumption - gasoline, diesel or natural gas.
If your car runs on natural gas, then high-heat iridium spark plugs from the Tough line are suitable for you. Such SZ are equipped with an additional platinum tip on the side electrode. In addition, they are characterized by high wear resistance, which is especially important for power units operating on gas. It should be remembered that the temperature of an internal combustion engine using gas is higher. Accordingly, if the engine runs on gas, the fuel mixture will burn at elevated temperatures.
Self-cleaning capability. The use of modern technologies allows candles to clean themselves during long-term use, so that the problem of carbon deposits is no longer a problem (author of the video - Hands in Oil).

A huge number of fakes. In fakes, the heat number differs from the original. Accordingly, the owner of a car running on any fuel, including gas, will not be able to experience all the benefits of the Denso product.
If the product itself is not original, its service life will be lower. However, car owners of cars running on diesel and gas periodically write in reviews that the service life of the originals is less than stated.
High price. But in most cases this is due to high quality.
On some new SZ, the gap is initially not set to the working one. This is confirmed by reviews from car enthusiasts.

Marking

If you want to correctly select iridium spark plugs for your car, it will be useful for you to familiarize yourself with the markings and decoding of the designations, which are given in the table below:

Marking and decoding of Denso spark plugs

How to distinguish an original Denso from a fake?

So, in order to purchase original SZ for your car, you need to know exactly how not to fall for a fake. There is a method of checking by appearance, as well as the internal structure of the device.

Visual aid - how do Denso originals differ from fakes?

Of course, when purchasing you will perform a visual inspection:

On fakes, the contact pin of the spark plug has a glossy surface, while on the originals it is more matte.
Unlike the originals, the printed text of the Denso brand on fakes can be scraped off without any problems. It is very difficult to erase this text on the original.
As for the case itself, on fakes it is made of less quality, in particular, we are talking about a low level of surface treatment.
The quality of thread cutting, as well as the electrode itself, in fake SZ is lower, this can be seen with the naked eye.
When using a fake, you will notice how the power of the power unit begins to decrease on inclines and at high speeds.
Fuel consumption may increase and this needs to be monitored.
Over time, the side electrode of the SZ will begin to melt; periodic diagnostics will help to understand this.

It is recommended to change SZ every 20 thousand kilometers, and herodium ones - 80 thousand.