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Discussion Starter #1
rying to figure out what plugs I should go with. Getting conflicting information. Here are the three I am looking at:

NGK 3657 Laser Iridium Spark Plug IZFR5K11

NGK # 4363 NGK Laser Platinum Spark Plugs PZFR5F-11


Which ones should I buy?
 

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IZFR5K11 have survived for 140k miles in my Pilot. I should have replaced them 10k miles back when I noticed gas mileage slightly decreasing.
 

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I see little reason to deviate from what it came with from the factory....the IZFR5K11. I replaced them at 120K on my 2006 and the original plugs looked pretty good, all things considered (although one plug was pretty loose, a common problem with leaving plugs in for these long change intervals).

- Mark
 
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