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10 Best Spark Plugs [Buying Guide]

Help Your Engine Start Quickly And Run Smoothly

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NGK G-Power Spark Plug

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Bosch Automotive Double Iridium Spark Plug

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best spark plugs

For how inexpensive they are, spark plugs are an essential part of a happily running engine. Whether you have a car, motorcycle, lawnmower, or other combustion engine-powered machine, spark plugs are vitally important. Here, we’ve gathered the best spark plugs on the market today so that you can keep your engines running smoothly and efficiently.

10 Best Spark Plugs For Your Car

When purchasing a replacement spark plug, there are a few things to be on the lookout for. First, is the type of spark plug. The main kinds you will see are copper, platinum, and iridium. Second, you’ll want to consider the durability and corrosion-resistance of the electrode. As the electrode wears down, the spark becomes less efficient. And you need to make sure that the spark plug will fit your engine. Before purchasing, check your owner’s manual. Spark plugs come in many different sizes and types, so you’ll need to be certain you get the appropriate type for your specific application.

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These platinum spark plugs are designed to minimize electrode tip erosion by adding platinum to the center and ground electrodes, allowing them to work smoothly for longer.

Their “twin tip” design allows for better ignition, meaning you will have fuel-efficient combustion. This package includes six spark plugs, which is excellent if you’re replacing multiple spark plugs at once.

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2. NGK G-Power Spark Plug

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Though inexpensive, these platinum spark plugs are made to last longer than most copper ones. The cold-rolled threads and trivalent plating means that you install the spark plug without cross-threading or needing anti-seize.

The 0.6-millimeter fine-wire center electrode provides better ignition so your engine should start smoother. If you’re looking for a step above standard, but don’t want to break the bank, these NGK ones are a good option.

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3. Bosch Automotive Double Iridium Spark Plug

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The double iridium design of this Bosch spark plug is designed for long-lasting service. Two major parts, the firing pin and ground electrode inlay, are constructed of this stronger double iridium material so you get much less wear than with a normal spark plug. The manufacturer claims this spark plug lasts four times longer than standard copper spark plugs, so if you don’t want to think about swapping them out often, this will help.

It is designed with 360-degree continuous laser welding, which fuses the iridium firing pin so the spark plug lasts even longer. This also means you won’t need to use anti-seize when installing them, giving you added peace of mind. It’s also sold in different sizes, so you are more likely to find a size that works with your vehicle.

4. NGK Iridium IX Spark Plug

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The iridium construction of this spark plug ensures longevity. This model is made with cold-rolled threads to prevent cross-threading and it requires no additional anti-seize coating, allowing for easier installation.

It also has advanced heat distribution providing reliable starts and preventing overheating. If you’re looking for an iridium spark plug, this is a good place to start. Just be sure to check if this one fits your engine.

5. E3 Spark Plug

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These copper spark plugs are designed for high-performance vehicles. They are most likely to fit in sports vehicles as well as jet skis, motorcycles, snowmobiles, and ATVs. Their design is aimed at better fuel efficiency and more horsepower.

They are also built to handle wider temperature ranges. And E3 claims that they help reduce carbon deposits and extend the life of your motor. If you’re looking for an ecologically-minded, high-performance spark plug, it’s worth checking this one out.

6. Champion Iridium Spark Plug

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Champion claims that the heat-active alloy that they use allows this spark plug to maintain a stable operating temperature under all load conditions. They are meant to last for a while, so you won’t need to worry about your engine needing constant upkeep.

They are also designed to provide a focused spark for maximum power and faster throttle response. If you are looking for a reliable, long-lasting spark plug, these might fit the bill.


7. Bosch Copper With Nickel Spark Plug

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This copper spark plug has a nickel center electrode, meaning it should last longer than a standard copper spark plug. Plus, you don’t need to use anti-seize when installing them, so there’s less to worry about on the install.

They are also designed for improved cold starts and better fuel ignition. This listing includes several different sizes, so you can likely find one to fit your vehicle.

8. Motorcraft SP-479 Spark Plug

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These spark plugs have a high melting point. They have a simple, standard design that makes them easy to install. They are fairly inexpensive as well, meaning that you can easily stock up on them.

This brand is designed with Ford, Lincoln, and Mercury vehicles in mind, so if you drive one of those makes, you are more likely to find an accurate match for your engine with Motorcraft spark plugs.

9. Autolite Platinum Spark Plug

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This spark plug has a full platinum tip which helps keep gap erosion at bay. The nickel-plated shell is also corrosion-resistant, ensuring a longer life for the spark plug.

This relatively inexpensive platinum spark plug includes a four-year limited warranty, so you should be set for a long time. Autolite claims that the center electrode fires quicker and cleaner so your engine will start easier, and you can enjoy quicker acceleration and better fuel economy.

10. Denso Iridium Spark Plug

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This high-quality iridium spark plug should not wear down quickly. It is specifically designed to provide stable combustion when your car is idling, a high acceleration, and long-term reliability.

Denso even claims that this durable spark plug will hold up to wear even with extreme driving or racing conditions. If you’re searching for an iridium spark plug with higher performance and a longer life span, this one is worth checking out.

Frequently Asked Questions

Which is better iridium or platinum spark plugs?

Iridium spark plugs are constructed of harder metal and have a higher melting point than platinum spark plugs, so they tend to last longer.

Some car manuals specifically call for iridium spark plugs, and, if that’s the case, you shouldn’t downgrade. However, iridium ones are more expensive upfront.

Platinum, in turn, lasts longer than copper spark plugs and is more expensive, though some older cars will require copper.

How often should you change your spark plugs?

Your vehicle manual should have a recommendation on how often you should change your spark plugs. In general, their life span ranges between 20,000 miles and 40,000 miles, though many can last up to 100,000 miles. It depends on the type of vehicle you drive and the type of spark plug you have, so be sure to check the manufacturer’s recommendation.

Should you replace all your spark plugs at once?

It is recommended that you change all of your spark plugs at once when one needs to be replaced. This saves you time and prevents you from losing track of which ones you have already replaced.

What are the symptoms of bad spark plugs?

It may be time to replace your spark plugs if you notice any of the following:


About Justice Sahaydak

Justice is an avid outdoors-lover who has dabbled in mountain biking, camping, hiking, cross country skiing, hammocking, and more. She is currently pursuing her B.A. in English at the University of Minnesota, and she’s always up for talking about either bikes or books.

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