Quote:
Originally Posted by nkaminar
Most people think that it is important for the drain tube to extend into the oil in the bottom of the pan. The reasoning is that this prevents pressure in the pan from preventing the oil from draining from the rear of the rear bearing and thereby causing the oil to drip out onto the ground.
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I would think that the inside of the tube would see the pan air pressure plus the depth of the oil above the tube outlet.