OIl Fouled Spark Plug

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Changing the spark plugs in my used 2008 Honda Pilot. Found Cylinder #1 (Back passenger side of the engine block) had an oil-fouled spark plug. What is causing this? I read via the below link, "What causes oil-fouled sparkplugs? Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber, leading to oil fouling. ... Fuel, oil and carbon fouling can all be the result of different causes but, once a spark plug is fouled, it will not provide adequate voltage to the firing tip and that cylinder will not fire properly." Is this the issue? Can the Lucas Lucas Oil Products Heavy Duty Oil Stabilizer (1 qt.) correct this issue without tearing the engine apart?