15 Best Spark Plug In The Market To Buy With Reviews (2024)

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BOSCH 9614 OE Fine Wire Double Iridium Spark Plug - Pack of 4
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NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
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6 PCSNEW -- DENSO #4504 PLATINUM T T Spark Plugs -- PK20TT
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BOSCH 9614 OE Fine Wire Double Iridium Spark Plug - Pack of 4
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NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
6 PCSNEW -- DENSO #4504 PLATINUM T T Spark Plugs -- PK20TT
NGK 6619 Iridium Spark Plugs LFR6AIX-11 - 6 PCSNEW
BOSCH 9614 OE Fine Wire Double Iridium Spark Plug - Pack of 4
BOSCH 9614 OE Fine Wire Double Iridium Spark Plug - Pack of 4
Cocoa Door Mirror Remote Control Switch
Cocoa Door Mirror Remote Control Switch
NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
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6 PCSNEW -- DENSO #4504 PLATINUM T T Spark Plugs -- PK20TT
6 PCSNEW -- DENSO #4504 PLATINUM T T Spark Plugs -- PK20TT
NGK 6619 Iridium Spark Plugs LFR6AIX-11 - 6 PCSNEW
NGK 6619 Iridium Spark Plugs LFR6AIX-11 - 6 PCSNEW
Cars play an important role in our daily lives and thanks to their invention; we can now travel freely at any time anywhere. That is why it is crucial that your vehicle is in good shape and the parts are properly operating.

This way delays or accidents are avoided. As time goes by cars have evolved into more than just a means of transportation. They are now designed to be long-lasting and so are their parts.

Best Spark Plug

When it comes to parts, nothing is more important than choosing the right spark plug. In order to get the best spark plugs for your vehicle, let this article be your guide. Let us begin.

Types of Spark Plugs

Before anything else, know that there are four kinds of spark plugs that are currently sold in the market today. They are the following:

  • Copper core spark plugs
  • Iridium spark plugs
  • Platinum spark plugs
  • Double platinum spark plugs

Copper Core Spark plugs

  • Are considered to be the cheapest kind that you can buy. They are sold around $1-3 maximum and can receive 20,000 to 40,000 miles each use. They are also the longest conductors and works well if you don’t really travel that much.

Iridium Spark Plugs

  • These are less conductive compared to Copper Core but they can operate well in low temperatures. They can last up to 60,000 miles and although they don’t perform as well as the copper ones, you can count that they have a longer life compared to copper.

Platinum Spark Plugs

  • They are also able to work in low temperatures like iridium but they are most prone to overheating. However, they can last longer than copper or iridium.

Double Platinum Spark Plugs

  • Are the improved versions of platinum spark plugs. They are can also last longer and are able to help improve the performance of an engine. However, they are not the best conductors out there but they are the best when it comes to lifespans compared to the first three mentioned.

15 Best Spark Plug in the Market Today

Now that you know what the different kinds of spark plugs are, it’s time for you to choose. Here are the top 15 spark plugs that you can find in the market:

1. Denso (4504) PK20TT Platinum TT Spark PlugDenso (4504) PK20TT Platinum TT Spark Plug

Another great spark plug belongs to Denso. This is made with twin-tip technology that has an 11mm platinum center electrode. It also comes with an 11mm titanium ground electrode that is more enhanced than others.

It helps in fuel economy so you know that you won’t be using so much fuel when this is attached to your car. Compared to other plugs, the Denso PK20TT works faster.

It is also designed with an alumina powder insulator is purified so it provides dielectric strength as well as thermal conductivity. Because of this feature, the plug itself can stand up wear and tear even under extreme stress.


  • It works faster compared to other plugs.
  • It can help you save fuel.
  • It has dielectric strength.
  • It can withstand any stress.


  • It does not work on all types of cars.
  • May cause misfire.
  • May not work on bikes.

2. Denso (3297) SK20R11 Iridium Spark PlugDenso (3297) SK20R11 Iridium Spark Plug

Our next plug comes again from Denso. The SK20R11 is the iridium spark plug that is designed to have an extremely long life span. In fact, it’s 6 times better compared to other Denso plugs and is 8 times stronger compared to platinum plugs in the market.

It is designed to have the durability and strength of iridium so there is no electrode wear. This combined with platinum ground electrodes, the spark plugs can withstand anything even extreme driving or racing conditions.


  • It has excellent performance and acceleration.
  • It stabilizes combustion even when idle.
  • It is designed to be long-lasting.
  • It is very reliable.
  • It has a high melting point.
  • It’s sold at a reasonable price.


  • It’s cheap and works just like other plugs.
  • It does not fit all types of cars.

3. Bosch (4501) FGR8DQI Platinum IR Fusion Spark PlugBosch (4501) FGR8DQI Platinum IR Fusion Spark Plug

This type of plug has a fused platinum and iridium center electrode and is sintered into an insulator nose that is extended. This results in a self-cleaning temperature that happens after seconds of starting the vehicle.

It is also designed to resistant to wear and tear so you know that it can last a long time. The surface air gap technology that Bosch added to this plug makes it unique as it has four ground electrodes that are designed to deliver the powerful spark.

Because of this, it acquires the optimum horsepower even without using or increasing the voltage. It also has four yttrium ground electrodes that are enhanced to resist any oxidation or wear on the spark plug. This way the life span for your plug is longer.


  • It is easy to install and does not require adjustment.
  • The fusion voltage increases less over time compared to other iridium plugs.
  • It has a longer life and is very reliable.
  • It performs really well.


  • May not work on other vehicles.
  • Customers complained that the plugs stopped working after 5,000 miles.

4. ACDelco 41-993 Professional Iridium Spark PlugACDelco 41-993 Professional Iridium Spark Plug

These spark plugs are ideal for most cars that we have today. They are made with the latest spark plug technology and are a great alternative as a replacement for your car’s original parts.

The iridium composition of this plug has the strongest and highest melting point of all metals. Because of this, it has the greatest wear resistance and durability. This means they perform better compared to spark plugs that are conventional or made of platinum.


  • It provides stable and smooth performance.
  • It provides quicker acceleration.
  • It improves cold engines.
  • It helps reduce the use of fuel.
  • It prevents combustion leakage.


  • Customers complained about receiving reject plugs or plugs that are not the same match.
  • May not work on all types of vehicles.

5. Autolite APP104 Double Platinum Spark PlugAutolite APP104 Double Platinum Spark Plug

This plug is one of the favorites. Made of platinum tips with platinum on the side and center electrodes, these spark plugs can reduce the gap wear so that the plug can have a longer life.

It works to maximize the engine performance of your vehicle while improving fuel economy at the same time. The center of the electrodes fire quickly and is cleaner compared to other types. It also has lesser voltage so starting your car is easier and quicker.

The platinum alloy of this plug is made to have extended durability. It also has a nickel-plated steel shell so it is more durable to corrosion.


  • It can start your engine quickly compared to other types of plugs.
  • It is sold at a reasonable price.
  • It can perform really well.
  • It is made to be durable.
  • It gets the job done.


  • Customers complained that the porcelain part of this plug is weak while others complained about the gap.

Make sure to contact the company if you have encountered such issues so it can be resolved right away.

6. NGK 7090 BKR5EGP G-Power Spark Plug

best spark plug

This is the type of spark plug that would increase on quick starts, reduce emissions, boost fuel efficiency and also ensure that there is an increase in performance in your car and it is loved by most car owners due to its ability to be able to maintain and high and consistent spark thanks to its platinum tip that is laser welded.

Designed to be different from the rest spark plugs, this quality spark plug from NGK features high-quality configurations which cuts down on fouling but helps in the enhancement of throttle response. It is the type that would not be affected by corrosion as its metal platinum helps to fight against rust. It is one of the best products anyone can trust and can also be obtained at a very economical price.


  • Has a longer lifespan when compared with similar brands
  • Says no to issues of misfire
  • Less stress in installing this spark plug
  • Cars would run smooth with this plug


  • Cheap product
  • doesn’t fit

7. 6 New NGK Iridium IX Spark Plugs

best spark plug

If you want a quality spark plug that would be perfect for every turbocharged engine and fuel injected kind of engine then this is just the right choice for you. It is the type that doesn’t fall to rusting and corrosion as it features a trivalent metal plating design which fights against such and also prevents seizing.

With the use of this spark plug in your car, there would improve your car performance as well as an increase in mile service life which is why this product is a must-have for every car.

The New Iridium NGK spark plug is responsible for the increase in torque and horsepower in most engines thanks to the combination of nickel electrodes and fine-wire iridium center and users are sure that this spark plug has a decent and lasting lifespan as its electrode laser construction makes it durable.


  • This spark plug makes sure cars ride for as long as 160,000 miles
  • Can be purchased at an affordable price
  • This product got delivered right on time
  • Helps in bringing back lost power


  • Little or no improvement in the car’s performance
  • Failed to fit

8. 8 New NGK Iridium IX Spark Plugs

best spark plug

When talking about the best spark plugs that its results would be evident when used in your car then you should consider settling for the 8 New Iridium NGK spark plugs especially if you run a turbocharged or a fuel-injected engine.

The use of this spark plug in your car simply means there would be an increase in the mile service life of your vehicle and no one has to be worried about misfiring, seizing or even fouling as this spark plug helps in the correction of such issues.

Having a unique metal plating design makes this spark plug not to fall to rusting or corrosion and if you desire your car to have an increase in its horsepower and torque then look no further as this is the best spark plug to achieve such aim.


  • Installation is fast, easy and simple
  • Boosts MPG
  • Makes cars run better
  • Enhanced throttle response


  • Inconsistent gapping
  • Counterfeit design

9. ACDelco 41-962 Professional Platinum Spark Plug

best spark plug

The AC Delco 41-962 spark plugs are designed for use mostly in newer engines and engines that are built to run on conventional plugs. They are a good choice for such engines than other brands as they would improve mile service to about one hundred thousand miles before a replacement can be required.

With this spark plug, there would be no issue of a corrosive combustion chamber, fouling or even spark erosion thanks to its unique dual tip design which boosts resistance.

When compared with other brands, results showed that this spark plug maintains its gapping for the rest of its life and its corrosion-resistant design makes this spark plug the best against rusting and corrosion which also helps in extending the lifespan of this product.


  • Ensures smooth starts
  • Improved throttle response
  • Increases acceleration
  • Installation is quick and easy
  • Timely delivery


  • Not compatible with any type of engine
  • No pre-gaping
  • No fitting

10. NGK 2667 BKR7EIX Iridium IX Spark Plug

best spark plug

If you are seeking to improve your car’s performance then look no further as this is the ideal choice of spark plug for you. It has high anti-fouling power, would boost the response of your throttle and also make ignition fast and easy.

A stable and consistent spark is what this spark plug is capable of thanks to its iridium fine welded tip and having an electrode that has a tapered ground design reduces quenching fouling.

One feature that is found in this spark plug but isn’t in other spark plugs is a triple gasket design which helps to prevent issues of gas leakages and it also features a high melting point which makes this spark plug durable to wear and heating. It is the perfect choice to boost your engine’s performance.


  • Fits perfectly
  • Simple to install
  • Increases acceleration and boost mileage
  • Makes sure engines run smoothly
  • The best for supercharged and turbocharged engines


  • Causes misfiring in engines
  • Has no pre-gaping
  • Less increase in power as desired

11. NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

best spark plug

This is a spark plug with a whole lot of features that make it stand out from similar products that customers would find today and of all its properties, Fighting against fouling, improving throttle response and also accelerating ignition are what makes it superb and unique.

This spark plug comes with an insulator with a long nose design which reduces fouling while having a metal plated design also helps in the fight against corrosion and seizing.

Unlike other low-quality spark plugs that do not maintain a steady spar, this spark plug is capable of maintaining a consistent and durable spark thanks to its improved iridium tip. Another standout design is having a triple gasket design which makes sure there isn’t an issue of gas leakage.


  • Makes the running of engines smoother than before
  • Improves mileage
  • A must-have in every Toyota engine
  • Increase in power and acceleration


  • Incorrect gaping
  • Still noticing a delay in acceleration

12. Motorcraft Spark Plug SP546

best spark plug

When talking about durable spark plugs, one can be proud of the Motorcraft SP456 spark plug which is designed with high-quality materials that don’t just make sure it lasts long but also ensures that it meets all OEM specifications and requirements.

It is one that has a worry-free installation process as users would find it very easy to install and with this spark plug, there is also a high assurance that your car would no longer have issues of misfiring but would experience better throttle response and increase in acceleration.


  • Delivers great results when used in Ford cars
  • Affordable
  • Easy to install
  • Engines would run great and smooth


  • Two plugs already got delivered broken
  • Poor performance in general

13. Bosch 9694 Double Iridium Spark Plug

best spark plug

This is one of the rarest and uniquely designed spark plugs ever to be made as this spark plug guarantees up to seven years of effectiveness compared to other similar products while the combination of an electrode inlay and double firing pin extends the life span of this spark plug unlike in most copper spark plugs.

Being resistant to corrosion and other damages is also another factor that tends to make this product stand out from the rest and if you want a spark plug that will not only improve your vehicle’s ignition but also your vehicle’s overall performance then this is the ideal choice for you. It is one that delivers great function, form and fit.


  • Features a special coating that limits seizing
  • Guaranteed to last for about seven years
  • Engines would run smooth and nice
  • Improves mileage up to one hundred thousand miles


  • Not a durable spark plug as its porcelain got broken sooner
  • This spark plug fails as its effect isn’t consistent

14. NGK 3657 Laser Iridium Spark Plug

best spark plug

NGK is a trusted brand in the production of spark plugs and not just do they produce any type of spark plug but they specialize in the production of high quality and top performance spark plugs.

The NGK 3657 laser iridium spark plug is another trusted spark plug that would deliver solid performances when installing in your car and with this spark plug, there would be a noticeable change in how your engine runs, accelerates and also your engine’s ignition ability.

It is one that would not get damaged by corrosion or rusting as it comes with a metal plating design and one other thing customers need to note about this spark plug is it tends to increases mile service life which is also another reason why this spark plug needs to be in your car.


  • The best spark plug for use in a Honda Pliot
  • Helps to deal with misfiring issues


  • These plugs are believed to be counterfeit designs
  • Has less improvement in throttle response
  • These plugs do not fit

15. E3 Spark Plug E3.38 Powersports Spark Plug

best spark plug

If you run a 2 or 4 stroke engine then you might want to take a minute to look at this spark plug as it guarantees reduction of emissions after about fifty hours and one stand out or distinctive feature of this spark plug is its ability to get rid of carbon deposits which are capable of hindering your engine’s performance.

With this spark plug installed in your engine, there is a high degree of assurance that there would be a noticeable improvement in your car’s power.

Furthermore, this spark plug features a DiamondFire electrode design which helps in the production of a durable, stable and consistent spark and one more important feature to note about this spark plug is it also helps in the improvement of fuel efficiency from about six to twelve percent.


  • Engines would run smooth with these spark plugs installed
  • It helps in unleashing your car’s hidden power
  • Gets rid of hard starts


  • Not suitable for ATV’s
  • Has build-up of burnt fuel at its tip
  • Makes the engine feels hotter
  • Decelerates engine instead of accelerating engines

In case you do encounter problems regarding your spark plugs (like reject plugs for example) make sure to contact the company or site where you have bought the items. This way you can have it replaced or repaired. Make sure also to keep your warranty so they will honor your request.

How to Pick the Right Spark Plug

Picking the right spark plug is important although it may sound as easy as ordering them online, this isn’t always the case. There are times when the spark plug you have chosen may not fit your car. This could be very inconvenient in the end. So in order to avoid that, remember to:

  • Examine your car first and see what kind of spark plug you need.
  • If there are recommended spark plugs for your car, choose to purchase the same brand instead of experimenting. This will help avoid misfires and waste of money on your behalf.
  • If you don’t know what kind of spark plug to get, ask an expert. Let your mechanic examine your car and see what kind of plugs you should buy. This way you don’t have to shop blindly and assume it will work.
  • Make sure to review first. Meaning you have to do your research too. Read on the different kinds of spark plugs and know what they are. This way you can avoid picking the wrong one.
  • Find out what the most recommended spark plugs are. See also why they are recommended in the first. If people are satisfied with their performance then it could be a good option to take.
  • Know if your car accepts replacement plugs. This way you don’t use the wrong ones.
  • If you have the budget, find one that can perform well and has a long-lasting life span. This way you don’t have to spend very often on just spark plugs alone.

How to Install a Spark Plug

Say you have found the best spark plug for your car; it’s time to install it! But how can you do this? If you are a new car owner tinkering around your car can be confusing but if you only want to change the spark plug then it wouldn’t be that hard. Here’s how you can do it:

  1. Make sure to clean the hold for your spark plug within the cylinder block. You need to clean it with a lint-free cloth. Wipe the hole, removing all dirt from it. Make sure that you don’t shove any dirt into it or it won’t work.
  2. With a dab of oil, lightly coat the threads of the spark plug. Make sure that you don’t put any oil on the sides or center electrodes.
  3. Begin to thread in the spark plug into the engine with your hand. Turn it clockwise; this step is called seating the plug. Make sure that the plug is not crooked or ruining the threads. Avoid ruining the threads in the engine’s plughole too.
  4. With your hand, engage the plug. Make sure to turn it with at least two full turns before you use the ratchet and plug sockets.
  5. Slip in the plug socket over the spark plug. Attach the handles of the ratchet and continue to turn the plug clockwise until you feel resistance. However, do not tighten it too much or the porcelain will break. Make sure that it’s not too tight or too loose or it might not work.
  6. Check the cable of the spark plug before attaching the boot to the plug. If it’s cracked, frayed or brittle have it replaced. Replace it also if it’s saturated with oil. Apply some silicone lubricant inside the boot before attaching it. Push the boot over the exposed terminal of the new plugs and gently but firmly press it into place.
  7. Repeat all steps until all plugs (depending on your car) are connected.

Additional Information About Spark Plugs

Just like other parts or components found in vehicles, sooner or later, spark plugs tend to wear out, and its functions begin to decline. This means you have a duty as a car or truck owner to check as well as carry out maintenance procedures on the spark plugs and substitute them if necessary.

As stated by the Car Care Council, you should replace spark plugs if you have driven within a range of approximately 30,000 to 100,000 miles. This usually depends on the type or model of vehicle as well as the kind of spark plugs that are being used.

It is crucial for car owners to have access to the right knowledge about the functions of spark plugs, its maintenance procedures and other requirements which will ultimately serve to enhance the performance of the engine, thus resulting in the enjoyable driving experience.

A spark plug comprises of the following:

  1. Terminals– the terminals are connected to the ignition coil
  2. Jacket – This component is threaded, and this is where the spark plug connects to the cylinder head. You must not touch it when it’s in operation since it allows electricity to pass through it.
  3. Insulator– The insulator is usually made of an aluminum oxide ceramic and typically originates from the jacket to the combustion chamber. The insulator is powerful enough to sustain 60,000 volts and up to 650o Celsius.
  4. Ribs – The ribs on a spark plug is fabricated to prevent the leaking out of electricity. It is designed such that it will increase or enhance electrical resistance.
  5. Seal – The seal does the work of stopping any leaks that are coming from the combustion chamber.
  6. Central Electrode– The central electrode can be fabricated using nickel-iron or copper and is the location where the voltage accumulates and transmits to another electrode known as the side electrode. The voltage jumps through the air at about 60,000 volts.
  7. Side Electrode – What makes the jacket a dangerous place to touch is the connection it has to the side electrode. To ignite the fuel/air mixture, electricity jumps starting from the center electrode to the side electrode. Afterward, the electricity is conducted to the engine and then grounded.

Spark plugs are not meant to be fixed to engines and left alone. Regular maintenance checks are required to ensure that you continue to enjoy a smooth and trouble-free driving experience anywhere you go!

Final Thoughts

The safety of your car is important which is why it is also important to choose the best spark plugs from our reviews. We have given you the best spark plugs that you can find today and so make sure to pick one that will suit your needs.

In case you have no idea what to do, consult an expert. Doing so will help you avoid delays and unnecessary expenses in the future.