Spark Plug Question
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From: Newfoundland, Canada
Thread Starter
Evolving Member
iTrader: (1)
Joined: Feb 2011
Posts: 163
Likes: 0
From: Newfoundland, Canada
I just check my plugs in my 06 RA and here is the outcome:




Now to my understanding, I thought plugs should be a tannish colour. Black would be to rich and white too lean. Mine seems to be on the white side (not good).
Note: These are the original Iridium plugs (
recommends replacement at like 168,000Km I think).
The car has been driven hard by the previous owner and harder by me
. I run 89 octane and have no engine mods. So my question to you guys would be what should I do? I was thinking I should change the plugs, go for a run, come back and check the colour. What would you do?




Now to my understanding, I thought plugs should be a tannish colour. Black would be to rich and white too lean. Mine seems to be on the white side (not good).
Note: These are the original Iridium plugs (
recommends replacement at like 168,000Km I think).The car has been driven hard by the previous owner and harder by me
. I run 89 octane and have no engine mods. So my question to you guys would be what should I do? I was thinking I should change the plugs, go for a run, come back and check the colour. What would you do?May I ask why you only run 89 octane? I would think this would not be good either?




