I tried to read through this thread but couldn't do it. So if this has already been said then excuse the repeat. The ONLY explanation for getting 1/2 qt more
oil on an engine drain when cold vs. hot is that "extra" 1/2 qt is what would normally be held in the engine from circulation and wetting all
oil quenched surfaces. Let it sit and cool down, then that
oil drains back to the oil pan.