Let us use a bit of logic here. What is on the other side of the spark plug? The combustion chamber. There is usually NO OIL in the combustion chamber unless you have a completely worn out set of rings. So, if there is no oil on the other end of those threads, how could it possibly be leaking past them?
Putting any type of thread sealer on spark plug threads is simply not useful. The seal is made by either a tapered seat or a gasket. NOT the threads.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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