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Originally Posted by pmckechnie
By the way a question. It takes oil and AIR to cause foaming as it has been related to in this threed. If the oil pickup is on the bottom of the pan then where does the air come from to cause the aledged "foaming".
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After it leaves the pump, much of the oil is sprayed from nozzles. Also, moving parts, like the crankshaft, cause significant agitation of the oil. There is plenty of opportunity for foaming to occur. The fact that engine oils contain anti-foaming agents would tend to confirm that possibility.