NGK Laser Iridium Vs Ruthenium – A Real Comparison With Table

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In general terms, the NGK iridium and the Ruthenium are spark plugs for cars and automobiles. In general, they have some definite differences. In terms of long-lasting service and durability, the Iridium spark plugs give it a huge advantage. In terms of designs, the Iridium has one design only and the Ruthenium has 2. 

In other cases, the igniting ability of the two spark plugs also differs in some slight modifications. And as these are newer spark plugs compared to each other, they are also quite fuel-efficient. Brands can also differ.

NGK Laser Iridium Vs Ruthenium With Table

Product NGK Laser iridium Ruthenium 
Definition A maximum of 100,000 miles can be expected between changes. Ruthenium spark plugs are newer plugs that will give you the best out of their price.
Brands Out of all, NGK, Denso TT, and AC Delco produce iridium spark plugs. NGK is the best out of all for Ruthenium.
Cost They can be found for around 30 to 40 dollars.15 to 25 dollars is the range for these spark plugs.
Material Iridium is the base material.These are made from Ruthenium.
Melting point These have a melting point of 4471 degrees Fahrenheit or 2466 degrees Celsius.4233 degrees Fahrenheit or 2334 degrees Celsius can be seen.
Durable miles They can go anywhere from 60000 to 120000 miles depending on their use.A maximum of 100000 miles can be expected between changes. 

What is NGK Laser Iridium?

NGK 3657 Laser Iridium Spark Plug IZFR5K11 - 6 PCSNEW

In brief, these are some of the best spark plugs that are available right now. In terms of technology and usage, these work like a charm. They are made from one of the densest and most durable metals on Earth. With these, your engine will operate cleaner and cooler than usual. It is also much more durable than the Ruthenium spark plugs. These can also withstand high heat very well and can go up to 120000 miles depending on their usage. 

What is Ruthenium Spark Plug?

NGK Set of 6 Ruthenium HX High Spark Plugs For Ford Mazda Chevy GMC Lincoln V6

In general terms, the Ruthenium spark plugs are high melt temperature spark plugs for your vehicle. They are made to resist corrosion and wear better than other spark plugs containing palladium and such. Ruthenium is under usage as an electrode material and has really high resistance to heat. Though, they have a lower melting point compared to the Iridium spark plugs. These can offer up to 100,000 miles. 

NGK Laser Iridium vs. Ruthenium


When it comes to most car appliances and parts, durability plays a major factor in their overall quality. Without it, customers have to go through a lot of hassle, messing up the point all over. In the case of spark plugs, the durability factor matters largely as well. In the case of our comparison, the Iridium spark plug takes the lead. As a matter of fact, they are even more durable than platinum. They offer up to 120000 Miles of service which is exponentially high. On the other hand, 100,000 miles of service can be found in Ruthenium-basing spark plugs.


In terms of spark plugs, the design does not matter largely but their features do. In some cases, brands or types have different designs and categories. In our case, the Ruthenium spark plugs come in two separate designs. The DFE (Double Fire Electrode) and the PSPE (Projected Square Platinum Electrode) are the two designs for the Ruthenium spark plugs. However, the Iridium spark plugs come with only one design.

High ignitability 

In brief, the Ruthenium wins in this case. Overall it has a better and quicker fuel response, which generally results in better acceleration and easier and smoother combustion. The Iridium spark plugs still have a faster response to throttle operations and it also quickly improves the smoothness and impact of the acceleration.

Fuel efficiency 

Fuel efficiency is another key factor when it comes to choosing a spark plug. In this case, newer spark plugs are taking the lead. In our case of NGK laser iridium and Ruthenium, the Ruthenium spark plugs take the lead as they are better at preserving Fuel. Though, this is not a total advantage. Overall, your cat uses less effort in acceleration, which makes the Ruthenium plugs slightly ahead of the NGK Laser Iridium plugs. 


Another important part is cost. Without wasting words, as the Iridium plugs are made from a rarer form of metal and are better in almost all ways, they come at a much higher price of around 30 to 40 dollars. The Ruthenium, however, gives off a great bargain of about 15 to 25 dollars each. 

NGK laser iridium – Better for Durability

In terms of technological use, durability, and overall mileage of the spark plug the iridium spark plugs will give you a great service. As they have a very high wear and tear rate and also a high mileage warranty, you can basically install and forget and use the spark plug for ages without any hampering. So it’s for sure if you are using it in a solid way, the NGK laser Iridium spark plugs will give you a great service overall. 

Ruthenium Spark Plugs – Better for Fuel Efficiency

If you are looking for an eco-friendly, economical spark plug, then the Ruthenium might be the best workaround for you. As already mentioned, the Ruthenium spark plugs ease it out on your acceleration, bringing out some of the fuel that otherwise would have been used. Also, these are significantly cheaper than the NGK Laser Iridium spark plugs, with an almost 20-dollar difference on average. 

Final Words

As with all other appliances, cost and overall quality make a lot of difference in getting chosen. In the case of spark plugs, durability, ignitability or higher melting points, mileage, etc. Should all be taken into account. Though, both these spark plugs are amazing in their field. However, the NGK Iridium takes the crown overall and also bears a price for it.

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