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Spark plug change: What is the difference?

95 views 1 reply 2 participants last post by  rhysoul  
#1 ·
2011 Soul, 2.0L AT. It's time to replace the spark plugs. I'm going to buy the DENSO plugs, but what is the difference in performance of the 3396 vs 5357?
 
#2 ·
My guess is the more expensive plug (3396) is a longer life plug.

NGK has 2 types of iridium plugs for that engine too. A long life one, like the one that came with the car (and last 100k miles) and the one I bought that lasts about 50k miles “iridium IX”. They are also less expensive.