Do some research on cellulous media and moisture, and what it can cause. Apparently you ignored the info I linked. I guess you've never seen any milky build up under an oil fill cap? I have many times, mostly in cold weather, and if the vehicle is short tripped and the oil temp stays relatively low. There can be more blow-by condensation in the oil than you think. It happens every time a cold engine is fired up. It doesn't have to make the oil look like a milkshake.So in that case, your moisture expansion theory doesn't hold water (pun intended) because even a small amount of water in engine oil turns the whole thing into a chocolate milk frothy mess, and none of these wavy pleats are covered with frothy chocolate milk, there covered in properly colored engine oil. So where is all this "moisture" - enough to significantly expand these pleats, coming from? It doesn't take much water or coolant at all to change the color of the oil.![]()
Also, if an engine's PVC system is defective or doesn't work very well, then blow-by condensation moisture will remain longer in the guts of the engine and oil. Ever see how much water a PVC catch-can traps from the guts of an engine, especially in humid or cold weather?
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