Sparkplug choice

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Elevated 2013

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2013
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5.7L Hemi
What the heck is ruthenium?? Sounds like you just made something up! Stick with stock plugs. 2013 and older get copper resister NGK or Autolite spark plugs. Mid 2013 and newer get the platinum NGK plugs.
 

U&A

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2016 3500 SRW
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6.4 HEMI
If you have a newer truck, id say like 2014 and newer It will be safe. All the new hemi’s come with iridium now and that is not a lot different.

But seriously the best thing to do would be call NGK and actually talk to someone. I did it before when I had questions for the plugs in my truck and they were extremely helpful.


Sent while firmly grasping my redline lubed RAM [emoji231]
 

Octane

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New spec for longer service interval is using iridium instead of 30k copper plugs.My 13 Challenger and Ram runs fine on them. But ruthenium must be that new Klingon plug used on the starship enterprise.lol
 
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