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I have a 2012 Hemi 1500. 130,000 miles, had 87,000 Miles when I purchased it and no tune-up history. I guess I'm just darn lucky. What is the recommended service interval for a major tune-up like spark plugs Etc??
 

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2011 1500 Laramie 4x4 - SRT 392 swapped
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I typically replace plugs every 100k. They won't start causing issues until 120k-150k, but it's a good idea to change them every 100. You'll need 16 plugs, two per cylinder. It could be a lot worse though, the earlier Gen III Hemis needed new plugs every 30k. The switch from Champion copper cores to NGK Iridiums is what extended the service interval.
 
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