New plugs at 100K

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BillPressler

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Daughter's late '15 (built 8/15) recently turned over 100K. No starting or running issues; no CEL. How critical is replacing the plugs at this point?
 

ricklack

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What does the manual recommend? My 2013 3.6 said to replace at 160,000km (100,000 miles) but I had over 200km until I replaced them. It was still running great and all six plugs looked perfect. I did not notice performance or fuel economy boost after changing them, but I did have peace of mind.
 

hseiff

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Daughter's late '15 (built 8/15) recently turned over 100K. No starting or running issues; no CEL. How critical is replacing the plugs at this point?
I replaced them a number of years ago at 100,000 and it was very easy, so I suggest you go ahead and do it.
 

NOX4ME

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It's a good idea. I replaced my spark plugs at 68,000 miles and found them to have gas and oil fouling, even though I had no CEL to indicate a problem.
 

John H.

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I would change them. I am a PM junkie though. I would feel I was rewarding the car for 100,000 miles and giving it a good start towards its 2nd 100,000 miles.
 

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