A normal oil level will be below the crankshaft throws. Too much oil could cause aeration of the oil by the crankshaft splashing in the oil as it rotates. This makes it foamy, and the pick-up is pulling in some air and not pure oil, causing a loss of engine lubrication.
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'89 LX 5.0 - 5 speed. Original Owner
'94 E-150 4.9 Conversion Van
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