Top 11 Best Spark Plugs [2020]

As small and simple as they appear, spark plugs play a very critical role in your car’s engine. These bolt-like components work by producing a tiny electric spark between the center electrode and the ground electrode.

Now, this little spark initiates the ignition of air and fuel mixture in the combustion chamber of the engine. Therefore, without these lowly components, there won’t be any combustion in the engine which means that your car won’t even start.

Spark plugs wear out with time. This means that their effectiveness deteriorates as time goes by leading to problems such as misfires when accelerating, cold starts, and other engine-related issues.

That said, to avoid some of these problems and ensure that you always get the best engine performance, a regular check is necessary to replace them as soon as there is a need.

Amazingly, even with the vital role that spark plugs play, they have a very meager asking price. But don’t be fooled- the low price tag doesn’t mean that you don’t have to pay attention to the spark plug you buy for your car.

To help you make a perfect choice, we have put together some of the top-performing options out there.

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11 Best Spark Plugs

#1 NGK 7090 BKR5EGP G-Power Spark Plug

NGK 7090 BKR5EGP G-Power Spark Plug

Our first position on the list goes to this high-quality spark plug from NGK. It is available in a pack of 1 although we recommend the 4-pack since it offers a lower cost per unit than buying 4 plugs each separately.

This set of spark plugs is one of the options that are designed to give the best in terms of performance. I mean, by upgrading to this set, you will notice quicker starts, better fuel economy, and lower emissions.

A fine platinum tip is welded to the tip of the central electrode for long-lasting performance. The ground electrode is also of platinum alloy for further durability and to maintain a precise gap throughout the plug life.

The 0.6-mm platinum disk requires less voltage than wider tips. Therefore, in case you are looking for an efficient spark plug, our first option on the list should be one of the excellent options.

The trivalent metal plating protects the accessory from corrosion. Therefore, this option is one of the spark plugs that won’t give you a hard time when removing them for replacement.

We also like that these spark plugs come with triple gasket seals. The three gasket helps create a tighter seal that prevents air from escaping from the combustion chamber so that you get the best performance.

Pros
  • They are very easy to install.
  • They have anti-corrosion plating.
  • They maintain a precise gap.
Cons
  • They don’t offer the best compatibility.

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#2 Champion RC12YC Spark Plug

Champion RC12YC Spark Plug

Spark plugs are an essential component not just for your vehicle but also for other machines such as mowers and other lawn equipment. How well they work with your garden equipment has a direct impact on productivity.

Now, if you are looking for a perfect unit for use in your lawn equipment, here comes one of the options you should consider giving a shot. That’s why it comes in an affordable pack of 1.

Champion RC12YC Spark Plug is designed to make your starts quicker. Also, this plug enhances the efficiency level which makes it a go-to option in case you are looking for a way of improving fuel economy.

The durably-constructed spark plug features a copper central electrode that provides a precise heat range control for a very long time. The ultraseal shell provides better protection against corrosion.

This small-but-essential component is designed in conformance to the requirements of ISO and SAE standards. Therefore, it’s one of the spark plugs you can buy knowing that they will deliver proven performance.

Pros
  • It has easy on and off.
  • The construction is great.
  • It provides quick starts.
Cons
  • It comes in a pack of 1.

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#3 E3 Power sports Spark Plug Each

E3 Power sports Spark Plug

This spark plug comes from one of the industry’s most reputable manufacturers. Therefore, even before we dive deeper, we expect it to deliver better performance and last longer than most competing models.

The product comes in a pack of 1. It works well for boats, ATVs, Jetskis, trucks, chainsaw, automobiles, snowmobiles, and other machines where a decent plug is needed.

The advanced level of engineering it carries makes it a clear standout in the market. A case in point is the E3 DiamondFire Technology. This innovation manifests clearly in the superior electrode design.

Unlike the traditional options whose design interferes with the flame kernel, this high-quality spark plug has an open end for more complete combustion.

In other words, the spark that this plug produces helps to create more pressure against the cylinder. The additional pressure results in greater fuel combustion, ensuring better fuel economy with more horsepower.

The greater combustion that the E3 DiamondFire Technology delivers in every engine also reduces the level of emissions in gasoline engines which results in low carbon deposits and low greenhouse emission.

Pros
  • It provides more complete fuel combustion.
  • It has very wide compatibility.
  • E3 DiamondFire Technology is a plus.
Cons
  • The size is quite small.

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#4 Denso (3297) SK20R11 Iridium Spark Plug

Denso (3297) SK20R11 Iridium Spark Plug

If you are using copper or platinum spark plugs, you can consider saving a few bucks to upgrade to iridium plugs. They are so far the market’s best-performing spark plugs and will save you a bundle over the long haul.

Iridium is up to 6 times harder than platinum and up to 8 times stronger. That said, unlike the copper and platinum electrodes that wear out with time, the iridium electrode used in this plug will retain its pristine condition for a very long time.

For this reason, we see this spark plug as an ideal option for the colleagues who love to spend most of their time on the road or just for the automobile owners that want a unit that will serve the longest.

The iridium-tipped center electrode is only 0.7mm. The reduced diameter of the center electrode increases firing efficiency to render the high-quality spark plug a perfect option for the automobile owners who want a combination of efficiency and high performance.

The gasket is designed to provide a complete seal to prevent leakage. The wire has a 14-mm thread and a 16-mm hex size. The product also comes with a gap of 0.44 inches that translates to about 1.1 mm.

Pros
  • It is very durable.
  • It delivers great firing efficiency.
  • It ensures better acceleration.
Cons
  • It’s a little costly than copper and platinum options.

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#5 NGK Iridium IX DCPR7EIX Spark Plugs (Pair)

NGK Iridium IX DCPR7EIX Spark Plugs

Our next option on the list comes from a very reputable name in the automobile industry. Hence, they make use of cutting-edge technology in their design for performance that won’t disappoint.

The most impressive thing is that the pair also belongs to the category of iridium spark plugs. Thus, they are very tough and will deliver a long-lasting performance just like the previous option.

Although they are very durable, the electrode of the NGK Iridium IX DCPR7EIX Spark Plug is only 0.75 the size of platinum electrodes and just 0.25 that of the standard nickel electrodes.

The ultra-small diameter minimizes the voltage requirement when simultaneously improving the ignition system life. Therefore, you are also getting a combination of efficiency and durability in this pair.

The futuristic metal shell plating gives the product advanced anti-corrosion properties. That said, unlike some models that corrode with time to give you a hard time when removing, this spark plug is will retain its beauty throughout its life.

Pros
  • They will improve MPG.
  • The metal shell prevents advanced corrosion protection.
  • They come as a pair.
Cons
  • They don’t work in some models.

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#6 NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

The NGK 5464 BKR5EIX-11 is yet another option that won’t easily disappoint in all that it’s made to do. The package comes with 4 spark plugs and provides a better price per plug than any of the previous options of its caliber.

The high-quality spark plugs are among the most compatible options. I mean, you can use these plugs in most vehicles including high-performance automobiles and off-roading vehicles where quick acceleration is needed.

The iridium alloy is tougher than other available constructions and has a high melting point. That said, the construction of this spark plug boasts an incredibly long service life to heat and electrical wear. 

The fine iridium tip is only 0.6 mm wide to ensure great efficiency and a more stable spark that what most options out there can deliver. The design of the ground electrode ensures less flame kernel interference for more complete fuel consumption.

The trivalent metal plating has anti-seizing properties to give you an easy time when removing them. Also, this plating provides superior protection against corrosion to ensure added durability.

These spark plugs also come with a longer insulator nose. This feature curbs fouling while the corrugated ribs guarantee additional protection against secondary voltage or flashovers.

Pros
  • The high melting point of the construction is a plus.
  • The ground electrode comes with a well-thought-of design.
  • The 4 plugs is a good number.
Cons
  • It may be hard to note any change in mileage.

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#7 Champion RER8ZWYCB4 (9407) Iridium Replacement Spark Plug

Champion RER8ZWYCB4 (9407) Iridium Replacement Spark Plug

This spark plug is engineered for compatibility with all engine types and ignition systems. It works well with passenger cars, Powersports applications, light trucks, and many more.

Therefore, whether you are operating a Honda, Mitsubishi, Volkswagen, Jeep, Porsche, Audi, Dodge, or any other vehicle that requires a high-performance spark plug, chances are that you won’t go wrong with this model.

The center electrode is of fine-wire iridium while the ground electrode utilizes platinum construction. Therefore, if you want a spark plug that will deliver maximum life, giving this option a shot shouldn’t disappoint.

The exceptional design of the ground electrode ensures a sharper spark focus for a more impressive performance and faster throttle response that you can hardly get in other available options in the market.

The product is easy for anyone to install. However, it may require some little patience. Also, the manufacturer warns that you should avoid over-tightening it since it can strip the thread causing troubles.

Pros
  • It supports use with all engines and ignition systems.
  • It provides a faster throttle response.
  • It is designed for a sharper spark focus.
Cons
  • The installation requires some little patience.

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#8 Bosch Automotive 9612 Double Iridium OE Replacement Spark Plug 

Bosch Automotive 9612 Double Iridium OE Replacement Spark Plug

Improve the performance of your engine when enjoying the best fuel economy using this premium-grade spark plug. It comes from Bosch, a German manufacturer with a very solid reputation in delivering high-performance equipment.

The firing pin of this unit makes use of double iridium. The heavy-duty construction renders it 4 times as durable as copper so that it gives you the best value for your money.

The unit is engineered using cutting-edge OE spark plug technology, one of the major reasons behind its top performance. And because of this, this spark plug is among the best-selling options in the market.

The extensive engineering employed in the ultra-fine wire provides incredible ignitability and performance when reducing the voltage required to keep the firing efficiency as high as possible.

The shell has nickel plating for protection against corrosion and for additional durability of the spark plug. Also, this small accessory has a ribbed insulator design that helps eliminate flashover.

It offers great compatibility and will work with 01-06 Chevrolet Silverado 2500 HD, 07 Chevrolet Silverado 2500 HD Classic, 87-93 Chevrolet Corsica, 06-11 Chevrolet Impala, and many more.

Pros
  • It is available in packs of 1, 4, and 10.
  • It delivers up to 4X the durability of copper plugs.
  • There is no gapping needed for most cars.
Cons
  • It isn’t the cheapest option on the list.

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#9 Toyota Genuine Parts 90919-01235 Spark Plug

Toyota Genuine Parts 90919-01235 Spark Plug

For something that you simply have to install and forget like spark plugs, it’s at times wise to direct your money on the genuine OEM product rather than trying out the aftermarket options that you aren’t sure whether they will match your vehicle requirements.

Now, in case you have a Toyota model, here comes a genuine spark plug. The plug is from the original car manufacturer so you can buy it with the confidence that it is fine-tuned to meet your unique vehicle requirements.

The spark plug promises an amazing lifespan of up to 60000 miles. Therefore, this original part from Toyota is among the options that you have to install and forget without getting any trouble in the course of its life.

The rugged construction of this high-performance spark plug also stands up to intense abuse by heat without cracking like some options out there. The durable finish on the metal construction prevents corrosion.

Finally, we like that this unit installs easily. Therefore, even if you haven’t installed one before, getting the job done here is pretty straightforward given that you have all the necessary tools.

Pros
  • It is an exact OEM product.
  • It lasts for a very long time.
  • Installation is a breeze.
Cons
  • It is quite costly.

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#10 AD Auto Parts New Motorcraft (SP515) Spark Plug

AD Auto Parts New Motorcraft (SP515) Spark Plug

For those that are operating Ford vehicles, these Spark Plug serves as perfect replacements. They are highly recommended by the Ford manufacturer and other top engineers in the industry.

Nevertheless, apart from Ford vehicles, this set of high-quality spark plugs also works perfectly for Lincoln and Mercury vehicles. The amazing performance, dependability, and superb quality are what sets this set apart in the market.

The platinum construction provides more long-lasting performance than copper plugs. Therefore, if you are not looking forward to replacing your spark plugs any time soon, this set should be a great option with the ability to cover up to 100,000 miles.

The premium platinum construction boasts a higher melting point than copper. The tougher construction ensures that you get a more stable performance throughout the ride.

Finally, we like that these spark plugs have great resistance to corrosion, which helps maintain their pristine condition for an extended time. Also, it comes in a cost-efficient pack of 8 that goes for a generally cheaper price than 8 individual plugs of its caliber.

Pros
  • The packaging is nice.
  • The lifespan of up to 100,000 miles is impressive.
  • The plugs install fine.
Cons
  • 8 units may be more than you need.

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#11 Autolite AP5325-4PK Platinum Spark Plug

Autolite AP5325-4PK Platinum Spark Plug

If you are looking for the best deal on the market, this set from Autolite comes as an excellent option for you. Here, you are getting a pack of 4 at about half the price of the competition.

The center electrode is made of platinum, a material that provides better durability than copper. The platinum firing tip also has lower chances of misfires and will maintain an accurate gapping throughout the product’s life.

The smaller diameter along with the excellent engineering on the center electrode promotes quicker starts, lower voltage demand, cleaner combustion, and enhanced acceleration in different engines.

Also, the ground electrodes of the Autolite AP5325-4PK have a platinum alloy pad. This ensures platinum-to-platinum firing to ensure that it outlasts options that use copper in either of the electrodes.

The shell is of heavy-duty steel construction for maximum toughness. The nickel plating improves the durability of the shell when simultaneously eliminating any chances of catching corrosion.

Pros
  • The center and ground electrodes are of platinum.
  • The shell adopts steel construction.
  • The quality and price are great.
Cons
  • The gap size may vary although they are easy to calibrate.

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Frequently Asked Questions

Are Iridium spark plugs better than platinum?

Iridium is tougher and stronger than iridium. Therefore, iridium spark plugs perform better than platinum options in terms of durability. Also, iridium have incredibly fine electrodes for better efficiency. However, platinum versions also perform impressively and are less costly than iridium.

How long do Iridium plugs last?

Although the durability may differ with other features of the plug, most of the iridium models boast an impressive lifespan of about 80,000 miles.

Should I use OEM spark plugs?

Provided that the aftermarket option you want to buy matches your car, there is no harm in opting for them. In fact, they are even cheaper than the OEM parts. However, if you aren’t sure of compatibility, paying extra bucks for an OEM product is always worth it.

Will new spark plugs make my car run better?

Yes. New plugs will restore fuel economy, reduce (or eliminate) misfires, promote quick starts, minimize carbon deposits, and emission of toxic gases, among other many benefits.

However, the level at which you are going to enjoy these benefits will depend on what you choose.

How do I know if my spark plugs need changing?

There are many indicators of the need for spark plug changes. Some of the common ones include; poor acceleration, increased fuel consumption, engine surge, engine misfires, troublesome starts in the morning, and others.

Final Verdict

Even with so many great models out there, some spark plugs perform better than others. That’s why it’s wise to pay attention to the spark plugs you buy for your automobile.

Our list suggests some of the best-performing options in the market. However, since all do not guarantee compatibility with your vehicle, be keen to choose the one that matches your car sequence.

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