Best Spark Plugs

10 Best Spark Plugs: The Ultimate Guide for 2019

Last Updated: 15 Feb 2019

What Are the Best Spark Plugs?

The best spark plugs are important structural elements of the ignition system. They are intended for direct ignition of the fuel-air mixture in a gasoline internal combustion engine. The ignition of the mixture occurs when a spark passes between the electrodes of the spark plug. We recommend NGK 6619 Iridium Spark Plugs.

Which Type of Spark Plug Is Best?

The answer to this question is extremely simple. Metals such as iridium and platinum are more expensive, but they work better. If you are planning to spend a small budget on the best spark plugs, then the best solution would be to buy copper spark plugs. If you choose between iridium and platinum, then it is better to choose iridium. Again, it all depends on the funds you plan to spend. As a golden mean, you can buy platinum spark plugs.

Can Good Spark Plugs Increase Horsepower?

Yes, the best spark plugs can affect engine speed, since good spark plugs are faster and able to ignite fuels better. This increases in engine power.

Are Denso Spark Plugs Better Than NGK?

To make a spark plug comparison between Denso and NGK is hard, there are many different opinions. Both companies have the status of the best spark plug brand. Both brands are market leaders. The products of these brands are used to manufacture cars around the world. Each company uses specific technologies for the production of their best spark plugs. Therefore, the products of both brands have the highest quality. You can give preference to any of them. It is worth noting that you must install spark plugs that are suitable for the requirements of your car. If you choose them incorrectly, the brand name will be unimportant since they will not work as they should.

Do Iridium Spark Plugs Make a Difference?

Yes, these plugs affect the operation of the engine and provide a number of advantages such as increased engine power, reduction of fuel consumption, reduction of toxicity of the exhaust, the soft start of the engine even in severe frost. In addition, refractoriness of iridium significantly increases the resource of the plug.

TOP 10 Best Spark Plugs Compared and Reviewed

4 Bosch 4417 Platinum+4 Spark Plug (Single) Bosch 4417 Platinum+4 Spark Plug (Single)
9. 0
Our rating : 9.0 / 10 View product
5 NGK 7092 BKR6EGP G-Power Spark Plug NGK 7092 BKR6EGP G-Power Spark Plug
8. 7
Our rating : 8.7 / 10 View product
6 DENSO 5304 IK20 Iridium Power Spark Plug DENSO 5304 IK20 Iridium Power Spark Plug
8. 2
Our rating : 8.2 / 10 View product
7 Champion RE14MCC4 (570) Copper Plus Champion RE14MCC4 (570) Copper Plus
8. 0
Our rating : 8.0 / 10 View product
8 Bosch 9652 Double Iridium Spark Plug Bosch 9652 Double Iridium Spark Plug
7. 8
Our rating : 7.8 / 10 View product
10 Autolite APP104 Double Platinum Spark Plug Autolite APP104 Double Platinum Spark Plug
7. 0
Our rating : 7.0 / 10 View product

1. Best Overall: NGK 6619 Iridium Spark Plugs LFR6AIX

1. Best Overall: NGK 6619 Iridium Spark Plugs LFR6AIX

The leader of this rating is the product from NGK. NGK spark plugs are one of the most popular and reliable on the market which every NGK spark plugs review proves. In addition, it is quite expensive. The first advantage is that you buy a set of 6 spark plugs. That is, you spend more money on getting a large amount of product. Since the candles are made with the use of iridium, they are durable and high-quality work. Also, the effectiveness of this product is enhanced by the ultrathin electrode wire.

Pros
  • Set of 6
  • Iridium
  • Thin electrode wire
Cons
  • High price

2. Best Efficiency: DENSO 4504 PK20TT Platinum TT Spark Plug

2. Best Efficiency: DENSO 4504 PK20TT Platinum TT Spark Plug

The second is Denso spark plugs review. They are a good alternative to iridium best spark plugs. There is a rather wide electrode of 11 mm, but this does not affect the quality of work for the worse. The presence of a double platinum structure and a platinum electrode, as well as a platinum disk, ensure high efficiency and durability of the Denso spark plugs. The manufacturer uses purified aluminum oxide powder as an insulating material, which increases service life and provides good thermal conductivity. An additional advantage is a low price for such a quality product. Every Denso spark plugs review proves the perfect quality of the product.

Pros
  • Double platinum design
  • Purified Aluminum Oxide Powder
  • Good thermal conductivity
  • Long service life
  • Acceptable price
Cons
  • 11-mm electrode
  • Only one device included

3. Best Iridium Option for the Price: NGK 7090 BKR5EGP G-Power

3. Best Iridium Option for the Price: NGK 7090 BKR5EGP G-Power

This is a good model of iridium spark plugs from a well-known brand at an affordable price. Excellent quality is ensured by the presence of a fine tip, which reduces energy consumption but does not have an impact on performance. This, in turn, improves efficiency and provides a quick engine start. Here, platinum is only at the tip of the electrode, unlike the previous model. The price of the kit is higher than one standard spark plug, but you buy four options at once, which is advantageous for the price in general.

Pros
  • Platinum tip
  • The very thin electrode tip
  • A set of four options
  • Excellent performance
  • Provides quick engine start
Cons
  • Platinum is only at the tip
  • Some users tell in NGK spark plugs review that they would like to buy one or two option at once instead of four

4. Best Proven Brand: Bosch 4417 Platinum+4 FGR7DQP Spark Plug (Single)

4. Best Proven Brand: Bosch 4417 Platinum+4 FGR7DQP Spark Plug (Single)

Many are accustomed to the fact that Bosch is developing only electrical products for the home. Nevertheless, the brand produces excellent spark plugs. A vivid example of a quality product is the following model. You get unusual Bosch platinum spark plugs with a special plug design and 4 electrodes instead of one. In addition, these best spark plugs have a gain of yttrium. Its additional advantage is in ease of use and excellent performance.

Pros
  • Famous brand
  • 4 electrodes that provide a powerful spark
  • Easy to use and install
Cons
  • Relatively high price for such a product

5. Best Insulating Nozzles: NGK 7092 BKR6EGP G-Power Spark Plug

5. Best Insulating Nozzles: NGK 7092 BKR6EGP G-Power Spark Plug

This model of the plug is characterized by high performance and good build quality. There is a rather thin tip that has a beneficial effect on the quality of the engine. An additional advantage is a fact that platinum is welded using a laser. There are specially designed insulating nozzles that increase the amount of throttle response. Thus, you get a very high-quality device for a fairly low price.

Pros
  • Low price
  • High performance
  • Thin tin tip
  • Isolation spouts
Cons
  • One spark plug included
  • Platinum only

6. Best Thinnest Electrode: DENSO 5304 IK20 Iridium Power Spark Plug

6. Best Thinnest Electrode: DENSO 5304 IK20 Iridium Power Spark Plug

This product is one of the most expensive on the market and one of the three most expensive in this rating. Nevertheless, it is worth the money, because you get an option of premium quality with excellent technical characteristics.

The first distinctive feature is the incredibly thin tips of the electrode which has a width of only 0.4 mm. The second advantage is that iridium is used here, and it is known to be the best material for spark plugs.

All these factors affect the incredible performance of these best iridium spark plugs, which, in turn, affects engine performance only in the best way. You spend your money on a really high-quality thing. Read any Denso spark plugs review – every user is satisfied with their quality.

Pros
  • Very thin electrode
  • Laser design
  • High performance, which is proven by every NGK spark plugs review
Cons
  • Very high price

7. Best Price: Champion RE14MCC4 (570) Copper Plus

7. Best Price: Champion RE14MCC4 (570) Copper Plus

The next is Champion spark plugs review. The big advantage of Champion spark plugs is at a very low price. However, this does not mean that this spark plug is of poor quality. You get a standard simple model that is corrosion resistant, meets standards and has a long service life.

Yes, it is a copper spark plug, but many engines still require just such. If you need copper best spark plugs, then carefully consider this model. Because when you buy it, you will definitely be satisfied with the work of the option.

Pros
  • Low price
  • High efficiency
  • Corrosion resistance
  • Long term work
Cons
  • The copper spark plug is not suitable for everyone

8. Best Warranty Period: Bosch 9652 Double Iridium Spark Plug

8. Best Warranty Period: Bosch 9652 Double Iridium Spark Plug

Another best iridium spark plugs from the famous Bosch brand. Buying these best iridium spark plugs, you get the highest quality that you can imagine. This quality is achieved due to the presence of the iridium cap and iridium electrode. As you understand, such a large amount of iridium affects the high price of this product. Nevertheless, that is why Bosch spark plugs have the longest service life. In confirmation of the fact that the product will work for a very long time, you get a full 7 years’ warranty from the manufacturer.

Pros
  • Very high performance
  • Iridium cap
  • Iridium electrode
  • The electrode is very thin
  • 7 years’ warranty
Cons
  • Incredibly high price

9. Best High Performance Spark Plugs: NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

9. Best High Performance Spark Plugs: NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

These best spark plugs are suitable for vehicles with high performance. NGK iridium spark plugs have a thin electrode, so you get increased power and excellent performance for your engine. A distinctive feature is corrugated edges on the insulator, which prevents overlapping. Additionally, these best performance spark plugs are able to eliminate any flow of the gas mixture. This means that the energy of your engine will be used as properly as possible. This option is expensive, but you pay for excellent power and durability. If you are looking for a device for a very productive engine, then you have found what you were looking for.

Pros
  • What you need for high-performance engines
  • Corrugated ribs on the insulator
  • Very high power and performance
Cons
  • Not suitable for a regular car with average engine performance

10. Best Everyday Plug: Autolite APP104 Double Platinum Spark Plug

10. Best Everyday Plug: Autolite APP104 Double Platinum Spark Plug

The last is Autolite spark plugs review. This is the best option you can find on the market for everyday use. Namely, for commuting or shopping. Here you get good quality and excellent materials. This double platinum spark plugs offer everything you need for a comfortable ride in everyday life at an affordable price.

Pros
  • Great for everyday driving
  • Good design
  • Acceptable price
Cons
  • Autolite spark plugs are standard options without outstanding features or materials


Types of Best Spark Plugs

Depending on the metals, used in the production of electrodes, spark plugs are divided into:

The Best Copper Spark Plugs (or Chrome-Nickel)

These are the standard products. They are inexpensive, produce. They work to 25 000-30 000 km. Choosing such a plug, you buy a reputable quality product and do not overpay.

Platinum Spark Plugs

This is advanced and improved technology. The use of precious materials in the manufacture of the electrode gives a longer service life to the option. If such a spark plug has all the required parameters, you will drive at least 50 thousand km with it. In addition, “precious” plugs are less prone to the formation of soot, which allows the engine to work better.

Iridium Spark Plugs

Application of iridium in the manufacture of the best iridium spark plugs improves the characteristics of the product at times. Ideal, uninterrupted spark formation allows the engine to work without failures. The resource of such good spark plugs is about 100 000 km.

Best Spark Plugs Buying Guide – What to Look At?

When you decide to buy spark plugs, you have to pay attention to the two main criteria

The size

The too small size of the spark plugs for sale threatens with the fact that it does not screw into the socket in the engine; hence its electrodes will be too far from the combustion chamber. If the length of the best performance spark plugs is more than the recommended, then the electrodes will “stick out” from the socket too much, which may entail a piston strike on them. Nothing is good in both cases. That is why you need to choose the exact size that corresponds to the engine.

Heat Index

It shows the temperature of the recommended spark plugs. It is the time sign, after which the spark plug begins to give glow ignition. If the heat rating is higher, the performance spark plugs are “colder”, which means they can work in more aggressive, high-temperature conditions. A low heat rating means that a “hot” top rated spark plugs will quickly overheat, which adversely affects their service life. To choose the option, you need to find a list of interchangeable analogs in the instructions for your car.

Naturally, for a forced and high-speed “hot” engine, you will need cold best spark plugs with better heat output, that is, with a large calorific value, and for cooler motors, with a smaller one. The shorter the length of the thermal cone of the insulator, the better the heat removal from the product, the higher its heat index.

User Reviews

Before buying best performance spark plugs, be sure to read the spark plugs reviews about the product. This will help you choose the best spark plugs on the market and avoid difficulties in the future.

Best Spark Plugs 2019. Final Advice

The best spark plugs are some special devices for igniting the fuel mixture in the combustion chamber of different types of engines. The mixture is ignited using the electric discharge that occurs between the electrodes of the best spark plugs. If you want to buy the best spark plugs, pay attention to the size and a heat index of each model. You also have to remember that the chosen option must be suitable for the size of your engine and must match with all the requirements of the car manufacturer. If you pick the wrong product, it will work in the wrong way. And it does not depend on the brand.

The best spark plugs on the list are NGK 6619 Iridium Spark Plugs LFR6AIX. These products have a high efficiency. They are made of quality materials and provide perfect work of the engine.

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