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First things first. What year, make, model, engine, and mileage? When were the spark plugs last replaced? Short answer: Yes. They should be replaced as part of the major engine overhaul your car needs. There should never be any oil on the spark plugs. A little carbon buildup, perhaps, but no oil. That indicates a serious engine proble such as worn out piston rings, worn out valves and guides, or a worn out turbocharger seal.

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Q: If the spark plugs have oil on them do they need to be replaced?
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