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 - Tractor Profile: Oliver 70 Row Crop - by Staff. The Oliver 70 was part of the "Fleetline Series" and was manufacturered from 1937 to 1948. The row-crop configuration could have either dual or single front wheels. The Oliver 70 was also offered in the standard, orchard and industrial configurations. The tractors were sold in Canada. An early advertisement states "Power when you want it - power when you need it - power to help put in crops when field conditions are right and time and help are limited. That's the power you'll find in an Oliv
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