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would be more commonly known as oxidization as rust refers to a the redish/brown color that happens when iron/steel is interacted with water or oxygen

 
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You guys are providing good information but at the same time getting to technical on something that has nothing to do with the original post.

 
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Scientifically the deifintion for rest is any metal that has oxidized. Hence ferous oxide is brown or redish orange. while steel is made of iron that is also a ferous color. Aluminum will take on different traits while rusted.

 
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Rust is not always brown. When copper oxidizes it is green in nature. That is why brass rusts mostly green, because it is a high copper compound (alloy)

 
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Those stock plugs are probably fine. I bet there's barely a difference, if a difference at all, in how the car runs now. I replaced my stockers somewhere in the mid 20k's with Denso IK20's... no difference. My OEM plugs looked like the first picture, too. If anything, my car is faster because my wallet is lighter, so I accomplished some weight reduction.

 
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Any of various powdery or scaly reddish-brown or reddish-yellow hydrated ferric oxides formed on iron and iron-containing materials by low-temperature oxidation in the presence of water.
Any of various metallic coatings, especially oxides, formed by corrosion . (not oxidation)
A stain or coating resembling iron rust.
Deterioration, as of ability, resulting from inactivity or neglect.
Botany.
Rust fungus.
A plant disease caused by a rust fungus, characterized by reddish or brownish spots on leaves, stems, and other parts.
A strong brown.

v. rust·ed, rust·ing, rusts
v. intr.
To become corroded.
To deteriorate or degenerate through inactivity or neglect.
To become the color of rust.
Botany. To develop a disease caused by a rust fungus.


and in case you didnt know, aluminum does NOT contain iron.

 
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I said steel did, not aluminum.

 
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Demon, Give up the rust argument.

RUST IS KNOWN IN THE SCIENCE WORLD AS IRON OXIDE (Fe2O3), THE STUFF YOU SEE NEXT TO COPPER OR ALUMINUM IS OXIDATION. GET OVER IT.

Oh yeah, and steel (contrary to what the word was originally used to describe) is not always made from iron.

To answer the question posed by the thread starter, yes you have a problem. The plug is either the wrong heat range, or your engine is running lean in that cylinder. If you want the best spark, replace it with a copper plug of a cooler heat range. If you want more durable plugs (copper's only good for aboot 50000 km/30000 mi) that you won't have to change for a while, go with platinum or iridium.

 
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Steel is not made from Iron? Wow, what is it made from? Steel element?!

 
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Can you read
See, I used the words "not always" as a negative qualifier. If you were educated at all, or at least had any common sense like the rest of the good folks here, you would be able to understand that sentence to mean that SOME steel has iron in it, and other steel does not.

Take for example aircraft-quality T304 stainless steel that one might find in Borla's exhaust systems. T304 doesn't corrode because its carbon atoms are locked in a grid pattern such that they are surrounded by the other elements in the solution (Mg, Ni, Si, S, Cr, and P). Corrosion in T304 stainless steel usually comes in the form of chromium carbide or nickel carbide. Carbon atoms will not combine with those metals unless the carbon is precipitated out of its locked-grid arrangement. This only happens at extremely high temperatures that are typically not seen in exhaust systems (950°F-1500°F).

Oh, and for those of us who are uneducated - those seven elements that make up T304 stainless steel are Carbon, Magnesium, Nickel, Silicon, Sulfur, Chromium, and Phosphorus. Note that Fe (Iron) is not included in these.

Thank you.


-Edited because of inappropriate comments-

 
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Get off the rust kick or it will be closed...

I had stock plugs in my 01 EX and when I traded the car in for my 04 EX it had 90K miles on original plugs and it ran perfect, gas mileage was just as good as 15K miles....

And Elite, you're comment about Bosch being european so it won't work in a Civic is rediculous (sp?)....


Edit: and I cleaned up the thread, enough with the name calling...

 
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Ridiculous, like the tangents in this thread.

Agreed. No reason Bosch can't work in a Japanese car or American car.

If you can't remember how to spell ridiculous, just think of ridicule.

 
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If i change the spark plug will i feel any gain?

 
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depends on how bad your current plugs are worn

 
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well... they are double platinum plugs... when i pulled mine out i was suprised to see denso double platinum plugs in there