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94279 Ruthenium HX Series Spark Plug, Sold individually

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Manufacturer #94279
Vehicle Info Required to Guarantee FitAdd Vehicle


1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Projected Fine Wire Ruthenium Center Electrode; 5000 Ohms Resistance; (1) Fine Wire Platinum Ground Electrode; Gasket Seat Type; Solid Terminal Type
Ruthenium HX Series
Electrode Tip Material:
Ruthenium Electrode Tip
Quantity Sold:
Sold individually
60-day NGK limited warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material:
Copper Electrode Core
Gap Size:
0.04 in.
Heat Range:
19 mm Reach
Thread Size:
14 mm thread size

Vehicle Fitment Information

Vehicle Name
Fitment Information
1997 Dodge B2500
6 Cyl 3.9L
1997 Dodge Ram 1500
6 Cyl 3.9L
1997 Dodge Ram 1500
8 Cyl 5.2L
1997 Ford Probe
4 Cyl 2.0L
1997 Ford Probe
6 Cyl 2.5L
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Product Information


Constructed with the most advanced technology, NGK Ruthenium HX spark plug delivers high-ignitibility, better efficiency and superior power to maximize the performance of your engine. It withstands high temperatures in various driving conditions and provides more complete fuel burn than other metal spark plugs.

  • Offers superior corrosion resistance
  • Features improved blistering/anti-peeling
  • Patented ruthenium technology allows maximum durability and performance
  • Available in DFE (double fine electrode) or PSPE (projected square platinum electrode) tip design
  • Manufactured in high-class facility that meets stringent ISO standards
  • Guaranteed stable during combustion and engine operation

NGK Spark Plugs is a worldwide leader of innovative, world-class quality spark plugs and oxygen sensors in the automotive industry.

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Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
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Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Product Q&A

What is the difference between Ruthenium and Iridium?JIm R.Aug 08, 2023
Best Answer:Hi Jim, I'm pleased to assist you. Both the spark plugs are durable and have anti-corrosive properties, however, ruthenium spark plugs have an upper hand in terms of durability as the period of replacement of the spark plugs is 1,00,000 km when compared to the Iridium plugs that wear out at every 80,000km. Click the link below to order the Ruthenium plug while supplies last. Your order will come with a 30-day post-purchase price match guarantee. Enjoy shopping! <a href="https://www.carparts.com/spark-plug/ngk/ng94279?can=CPGG4850_CSQA_20230808" target="_blank">https://www.carparts.com/spark-plug/ngk/ng94279?can=CPGG4850_CSQA_20230808</a>
Grace G.STAFFAug 08, 2023
How is this plug for oil fouling? 2007 CamryDale B.Oct 19, 2022
Best Answer:Hi Dale, I'm glad to assist you. It will react the same way as any other spark plugs out there. Once oil enters the combustion chamber, any spark plug will accumulate oil deposits that keep the spark from arcing across the gap. I hope this helps, and happy shopping.
Arnel E.STAFFOct 19, 2022

Customer Reviews

Runs a lot better and no miss fire
Gary F.
Purchased on Mar 16, 2023
Wonderful spark plugs. Comes with the spec gap and works like a charm. Seems to have fixed the idle issue I had as well! Thanks
Ian L.
Purchased on Sep 14, 2023
Installed them yesterday along with the air filter and my car is back to nearly 100%
Seven Z.
Purchased on Feb 08, 2024