NGK® - HX™ Ruthenium Spark Plug

6 reviews|Item # sp186636|Similar Products
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HX™ Ruthenium Spark Plug by NGK®. NGK Spark Plugs is introducing the latest technology in high ignitability spark plugs to the automotive aftermarket NGK Ruthenium HX™. The ultimate high ignitability spark plugs from NGK. Modern engines demand spark plugs that provide top performance while enduring the most severe conditions.


  • DFE & PSPE™ tip designs
  • Superior oxidation resistance
  • Advanced high-ignitability technology
  • Enhanced blistering/anti-peeling

NGK Ruthenium technology provides maximum durability and performance in newer engines where greater ignition efficiency is demanded. Modern engine designs utilize advanced technologies to create more power with less fuel. This results in greater heat and pressure in the combustion chamber, which shortens the life the spark plug. In response, NGK created Ruthenium HX™, a high ignitability spark plug with outstanding service life.

Starting with a single product in 1936, NGK® became the world leader in innovation, technology, and premium quality in the manufacture of spark plugs for virtually every automotive manufacturer in the world. NGK`s extraordinary growth can be attributed to a philosophy of manufacturing the product where it is going to be used, which means a substantial number of products sold in the USA are made in America. One of the benefits of such a policy is the ability to work closely with manufacturers in developing products tailored specifically to their needs. Today with ISO 14001 and ISO/TS 16949 certification as well as state-of-the-art manufacturing and inventory facilities, NGK provides customers with the finest spark plugs and complimentary products.


NGK® - Spark Plugs Installation VideoNGK® - Spark Plugs Installation Video


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NGK® - HX™ Ruthenium Spark Plug
1-6 of 6 Reviews
4 of 5
Great Investment!
NGK® - Spark Plugs Ruthenium HX™
I had one that had a bad core but CARiD replaced it. I had some little more power and ran smoother. Gas lasted longer. My idling rpm was greater and had to normal out after it warmed up because it would jump at stop signs. Ended up burning out two of the ignition coils weeks later which I am having to order here if they get them all in stock. So buy ignition coils if changing to these so it's one job. Worth the investment.
Posted by Jason (Hanover Park, IL) / August 04, 20211997 Subaru SVX
It is worth the price. You're not gaining massive performance but also not losing anything whatsoever. They spark faster/longer and are much more durable than other spark plugs due to the ruthenium element involved. Longevity Is better than other plugs as well. Time will tell. The plugs are likely not pre-gapped to the OEM specs of your car. If so, make sure you use a proper tool/gauge. Do not use the old style disc gappers as they destroy the precious materials.
Posted by Customer / May 21, 20212012 Ford F-250
5 of 5
Good price, Good service
NGK® 96358 - HX™ Ruthenium Spark Plug
Good price, good service
Posted by Customer / May 02, 20212019 Honda Ridgeline
4 of 5
Not the Wrong Decision
NGK® 90220 - HX™ Ruthenium Spark Plug
I hope I have 1% improvement, but it isn't the noticeable improvement I hoped for. These should be worth the additional cost in total life at least.
Posted by mike (Frederick, MD) / July 28, 20202014 Ford Fusion
5 of 5
Improved Gas Mileage and Performance
NGK® - HX™ Ruthenium Spark Plug
In less than 500 miles I was able to record 37+ mpg for 200 miles at 70 mph with three people in the car. Also, around town went from 29+ mpg to 32+ mpg. Acceleration is smoother.
Posted by Customer / July 12, 20202017 Buick Encore
5 of 5
Tune Up.
Definitely noticed a slight horsepower increase after installation. Throttle response improved as well.
Posted by Peter (Derby, VT) / September 24, 20192001 Toyota Celica
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