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NGK Ruthenium HX #5165875 07/19/19 10:21 PM
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David1 Offline OP
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Has anyone used the new NGK Ruthenium HX Plugs here at the forum and if so did you notice any improvements?
We dont stock them at work right now.. However I have seen them online and they are pricey... Just wondering what you all think?
Below is what the NGK Website says.



The Latest Innovation in Precious Metal Spark Plugs.

Modern engines demand more power while using less fuel, shortening the life of traditional iridium and platinum spark plugs. NGK’s patented ruthenium technology stands up better to wear to bring maximum durability and performance to your engine.


Designed for every engine.

Ruthenium HX is available in two designs to best maximize the performance of your engine.

DFE (double fine electrode) maximizes ignitability while reducing emissions for low-heat engines. This NGK-patented design is recommended for non-turbo applications.

PSPE® (projected square platinum electrode) provides the best ignitability and service life for high-heat engines. This NGK-patented design is recommended for turbo and supercharged engines.


High ignitability for better cold starts.

Ruthenium HX provides more complete fuel burn than other precious metal spark plugs, resulting in quicker throttle response, smoother idle and better cold starts.

Better durability at high temperatures.

Ruthenium performs better at high temperatures in various driving conditions compared to the leading precious metal spark plugs

More stable under pressure.

Standard combustion tests look for a spark plug’s ability to maintain stable performance during combustion and engine operation. When compared to conventional spark plugs, Ruthenium HX remains more stable with less dispersion


2002 Honda Accord V6 3.0 Automatic Trans 250K Miles
Valvoline Maxx Life FULL SYN 5W30
HAMP or FULL Or HONDA Filtech A01s
Re: NGK Ruthenium HX [Re: David1] #5165891 07/19/19 10:54 PM
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slacktide_bitog Offline
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I would consider the Ruthenium a MUST in any car that it's hard to change the spark plugs in, so you won't have to do it again

Re: NGK Ruthenium HX [Re: slacktide_bitog] #5165901 07/19/19 11:14 PM
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David1 Offline OP
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Originally Posted by slacktide_bitog
I would consider the Ruthenium a MUST in any car that it's hard to change the spark plugs in, so you won't have to do it again


That makes perfect sense b/c there are some cars out there that you have to take the whole top of the engine off / intake off to do the spark plugs on the back.. Like on a front-wheel Driver car.

However, I'm trying to see if anyone here has used them and what improvements have they noticed if any?


2002 Honda Accord V6 3.0 Automatic Trans 250K Miles
Valvoline Maxx Life FULL SYN 5W30
HAMP or FULL Or HONDA Filtech A01s
Re: NGK Ruthenium HX [Re: David1] #5165906 07/19/19 11:20 PM
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spasm3 Offline
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How long are they reputed to last?


13 elantra 78k 5w30 synpwr
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17 mazda cx-5 12300 miles m1 0w30
Re: NGK Ruthenium HX [Re: David1] #5165913 07/19/19 11:32 PM
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UG_Passat Offline
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Nope. They don't came gapped properly for my application. I have a set of Denso Iridium tough ready, when it comes time to replace my NGK Iridium IX


2016 VW Tiguan|APR Stage 1|Neuspeed P-Flo|Osram CBI|Redline 5w30
Re: NGK Ruthenium HX [Re: David1] #5165914 07/19/19 11:33 PM
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Dyusik Offline
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They are a few bucks a plug cheaper than OE iridium option for my RX on rockauto. Exciting for me since I have to disassemble an unreasonable amount of the vehicle to get to the 3 rear plugs. Now if I can only find plugs to fit my R1, 15k mi intervals are no fun.


95 Cherokee 190K DELO 10W30, XG8
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14 RX450h 41k Idemitsu 0w20, WIX 57047
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Re: NGK Ruthenium HX [Re: David1] #5165915 07/19/19 11:34 PM
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Imp4 Online Content
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This is the same thing as the dino/synthetic oil debate.
It's not about superior performance, rather it is about longevity at a comparable performance level.


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: NGK Ruthenium HX [Re: slacktide_bitog] #5166141 07/20/19 09:15 AM
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hallstevenson Offline
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Originally Posted by slacktide_bitog
I would consider the Ruthenium a MUST in any car that it's hard to change the spark plugs in, so you won't have to do it again

Are they lifetime plugs ? Funny, lifetime fluids are a taboo around her but spark plugs are okay ? Iridiums are generally good for 100k miles so are these Ruthenium plugs spec'd for (a lot) longer than that ?

Re: NGK Ruthenium HX [Re: Imp4] #5166142 07/20/19 09:16 AM
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hallstevenson Offline
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Originally Posted by Imp4
This is the same thing as the dino/synthetic oil debate.
It's not about superior performance, rather it is about longevity at a comparable performance level.

Someone found some speculative evidence that the move to Ruthenium is due to high prices of the raw materials of Iridium and Platinum. Ruthenium has equal (?) properties and is substantially cheaper.

Re: NGK Ruthenium HX [Re: slacktide_bitog] #5166147 07/20/19 09:24 AM
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Snagglefoot Offline
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Originally Posted by slacktide_bitog
I would consider the Ruthenium a MUST in any car that it's hard to change the spark plugs in, so you won't have to do it again


Agree. With Factory Iridiums, you can do your first change at 100,000 miles. Put in a set of Rutheniums and you’ll be good for at least another 100,000 miles. So that’s 200,000 miles, possibly more. So effectively, most people won’t be doing a second change while they still own the car.


If you want the job done right......do it yourself.
Re: NGK Ruthenium HX [Re: David1] #5166180 07/20/19 10:05 AM
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Snagglefoot Offline
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Or this?

Rutheniums.PNG

If you want the job done right......do it yourself.
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