Updated at: 22-08-2022 - By: Lucas

For spark plugs, a wide variety of materials can be utilized. Ruthenium and Iridium plugs will be compared in this post to find which is the best choice. Choosing between these two materials can be difficult because they both have their own advantages and disadvantages.

The main difference between the spark plugs is that Iridium offers better corrosion resistance and durability for a higher price. There is no right or wrong answer when it comes to deciding between the two metals.

Make your selection based on what is most important to you. This alternative may be ideal for those who are concerned about costs. Iridium is a preferable choice if corrosion resistance and long-term usability are more significant considerations.

Let’s take a closer look at both of them and see which one comes out on top!

What Does A Spark Plug Do?

A spark plug is a device that is used in an internal combustion engine to ignite the fuel/air mixture. The spark plug consists of a metal shell, a center electrode, and a ground electrode.

The center electrode is connected to the high voltage side of the ignition system, and the ground electrode is connected to the engine block.

When the engine is started, the high voltage from the ignition system travels down through the spark plug wires to the spark plugs. The current passes between the center and ground electrodes, creating a spark.

The spark ignites the fuel/air mixture in the cylinders, and the engine starts running.

The sparks produced by a spark plug are very small, so it is important that the electrodes are kept clean and free of deposits. If the electrodes are dirty, the spark will be weak and the engine may not run properly. A spark plug that is fouled with deposits should be replaced.

What’s Ruthenium?

Ruthenium Spark Plugs

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If you’re looking for an answer to what’s ruthenium?

then you’ve come to the right place. Ruthenium is a rare metal that is found in platinum ores. It is a hard, silver white metal with a melting point of about 2, 500 degrees Fahrenheit.

Ruthenium has a number of interesting properties. It is very resistant to corrosion, and it has a high melting point and boiling point. It is also very brittle and can shatter if dropped on a hard surface.

Ruthenium is used in some alloys because of its resistance to corrosion, and it is also used in spark plugs and other electrical devices. Ruthenium spark plugs are used in high performance engines because they can produce more power than other types of spark plugs.

What Are The Pros Of Ruthenium Spark Plugs?

Ruthenium spark plugs have a number of benefits that make them a popular choice for high performance engines. Here are some of the pros of using ruthenium spark plugs:

What’s Iridium?

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Spark plugs are made from iridium, a precious metal that is hard to come by. It is the world’s hardest metal and has the highest possible fusion temperature. Because of its fragility and brittleness, iridium is a challenging material to work with.

Iridium spark plugs can tolerate extremely high temperatures and can last for up to 100,000 miles before they need to be changed. High-performance automobiles and motorbikes frequently use iridium spark plugs because of this. In addition, they are more expensive than other varieties of spark plugs in the market.

What’s The Difference Between Ruthenium And Iridium Spark Plugs?

Iridium Spark Plugs

Spark plugs use metals such as ruthenium and iridium. Rutinium is a platinum-group metal, while Iridium is the most corrosion-resistant metal known to man.

If you’re looking for an inexpensive spark plug, ruthenium-electroded ones are your best option. Spark plugs with iridium electrodes have a longer lifespan but are more expensive than those with ruthenium electrodes.

Iridium spark plugs are recommended by most automakers because they provide the finest performance and the longest life. However, if your car does not have iridium spark plugs, you can use a ruthenium electroded spark plug instead. Replace them more frequently.

What Are The Pros Of Iridium Spark Plugs?

A multitude of advantages make iridium spark plugs a popular choice for high-performance engines. Using iridium spark plugs has a number of advantages:

What Are The Cons Of Ruthenium Spark Plugs?

There are a few drawbacks to using ruthenium spark plugs in your vehicle. In the first place, these plugs can be more expensive than standard spark plugs. In addition, they may not survive as long as alternative plug options.

The use of ruthenium plugs in some engines may not be ideal. If you’re not sure if ruthenium spark plugs are right for your car, talk to an experienced mechanic.

What Are The Cons Of Iridium Spark Plugs?

Iridium spark plugs have a few possible drawbacks. In the first place, these plugs can be more expensive than standard spark plugs. The second reason is that local merchants may not carry them as readily as online businesses do.

Final point: They could need more attention and upkeep than standard spark plugs. As a result, most drivers feel iridium spark plugs to be a worthwhile investment because of its numerous advantages.

Do Ruthenium Spark Plugs Offer Better Fuel Economy?

Even though iridium spark plugs have better performance, ruthenium plugs save money on gas because of their superior fuel efficiency. However, the difference isn’t that large.

High performance engines benefit from Iridium spark plugs, whereas Ruthenium spark plugs are a solid choice for most applications. Both materials are long-lasting and corrosion-resistant, making them suitable for a wide range of automobiles.

Spark plugs should be checked if you’re having difficulties starting your car or the engine is running rough. Replace them if necessary.

Ruthenium vs Iridium – Which One Should I Pick?


There are a few factors to consider while deciding between Ruthenium and Iridium. Depending on the application, these metals may be better suited for specific uses than others. A comparison of Ruthenium with Iridium will reveal the following key differences:

The pricing differential between Ruthenium and Iridium is the most significant difference between the two. Ruthenium is significantly less expensive than Iridium, making it a viable alternative for several applications.

In comparison to Iridium, Ruthenium is a softer metal and so may not be as strong. As a result, Iridium is a superior choice for applications in which severe chemicals or other components are likely to be encountered.

As Iridium’s melting point is lower than that of Ruthenium’s, the latter may be preferable in applications requiring a high level of heat tolerance.

Ruthenium and Iridium’s pricing is the most significant distinction between the two metals. In the event that price is a major consideration, Ruthenium might be a preferable choice. In contrast, if long-term performance and resistance to corrosion are more critical considerations, Iridium might be a superior option.

Which Spark Plug Offers Better Performance?

There is no clear-cut answer as to which metal provides the best outcomes when it comes to performance. Unique characteristics of Ruthenium and Iridium make them useful for specific applications.

For high-performance engines, iridium spark plugs are frequently regarded as the best choice. A popular choice among drivers seeking the finest potential performance, these spark plugs provide more power than other varieties.

Iridium spark plugs are the ideal alternative if you want to get the most out of your engine. There are other options, such as ruthenium plugs, if you’re not concerned about achieving the finest potential performance.


How Often Should I Replace My Spark Plugs?

Spark plugs should be replaced every 30 000 miles by the majority of OEMs. You may need to replace your spark plugs more frequently if your car isn’t equipped with iridium plugs. To learn more about what’s required for your individual car, consult the owner’s manual.

For peace of mind, get your spark plugs checked out by a professional mechanic. They can tell you whether they need to be replaced because they are unclean or fouled.

How To Replace A Spark Plug?

As intimidating as it may be to replace a spark plug, the process is actually rather simple. In order to replace a spark plug, follow the steps below:

Take your car to a mechanic if you don’t feel comfortable doing this on your own. In no time at all, they’ll be able to change your spark plugs for you.


There are a lot of things to keep in mind while selecting a spark plug. Unique characteristics of Ruthenium and Iridium make them useful for specific applications. Compared to Iridium, the cost of Ruthenium is lower, making it more accessible to some drivers.

Iridium, on the other hand, is more corrosion resistant than Ruthenium and has a greater melting point, making it a better choice for applications requiring a high level of heat resistance.

In the end, what’s best for your vehicle depends on your own preferences and financial situation. The best way to choose which spark plug is perfect for you is to consult with a reliable automotive specialist.