Oil on my last spark plug?! - Mustang Evolution

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Old 11-09-2014, 11:04 AM   #1
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Oil on my last spark plug?!

I'm changing the spark plugs to my car because it started to shake yesterday. When I took out the last one I saw oil on the tip. What does that mean ? Should I worry about it ?

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Old 11-09-2014, 12:50 PM   #2
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Cracked oil ring or head gasket or valve guide?

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Old 11-14-2014, 09:56 PM   #3
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You had oil on the electrode itself? Or on the threads?

The threads accumulate a small buildup over time from pcv usually, nothing really big.

If it was on the electrode itself then there was no way it was firing at all, as it would burn it off.

How is it running with the new plugs?

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