[omegaman]

Originally Posted by BackinBlackSS/RS

I don't change my own oil anymore, but I used to and all my cars I used a
hydraulic jack. I let the oil drain then lower the jack and quite a bit more would come out.

Good observations. What you say is true depending on the motor design. On some motors, the oil gets trapped in the heads. This is why you see more oil drain out when you lower the jacks -- oil trapped in the heads flows back (forward) to the drain holes and into the oil pan.