Oily Spark Plug

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I was doing a tuneup on my truck, once I got to removing one of the spark plugs it came out oily, is this fixable? The truck has no issues with idling or even a check engine light.
 

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Joined
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Minor is a word I'd use. Unless its misfiring, leave it be.
The solution is new heads.
Or a teardown, new valve seals, valve springs, likely valve stem guides, milling the heads, head gaskets, valve cover gaskets, intake gaskets...
So your saying ls swap? Jk I ended up changing the spark plugs and it’s completely running fine, as a matter a fact even better than before.
 

Frank Enstein

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Oil on the threads is an indicator of a vacuum pulling oil in. Generally valve guide seals, intake manifold leak into the lifter valley, or a pcv valve connected to a single manifold runner.
 
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