Found oil on spark plugs on 1999 ford f-150?
Found oil on spark plugs on 1999 ford f-150? - 1
Oil getting past piston rings, most likely the oil scrapper ring.
New rings needed. If you don't things will get progressively worse until there's thick blue smoke coming out your exhaust.
If the oil's on the OUTSIDE of the plugs, you obviously have an oil leak.
If the oil's on the TIP, read Robert's answer, which basically means your engine's shot.
Ring job!
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