dr bob

Tilt the car a little so it's nose-down. Pour a gallon of kerosene or paint thinner down the filler neck with the drain plug in. Let it sit a bit to loosen any oil in there, then drain it. Pour another gallon down there with the drain plug out, pour as fast as you can. If the washer doesn't come out that way, then go fishing with a good magnet on a flex shaft, or maybe held in the jaws of one of those flex pickup tools. The magnet has to be small enough to go through the drain plug hole, so that super-neodimwit magnet from that old subwoofer won't do it. The washer will be in the front of the pan most likely, between the filler neck port and the drain port on the pan. The magnet will stick to the oil pickup, so make sure your griper is strong enough to pull the magnet off of that without losing it. With the oil out of the pan, the washer is less likely to be stuck flat on the inner surfaces by oil film grip.

After you drain the solvent out completely, and the crankcase ventilate a bit. Refill the engine with some old Castrol, run it to warm it up, then drain and refill with your favorite flavor of oil, along with a new filter. Frame that washer, display on shop wall with a note about what a chore it was recovering it. I ran out of wall space in the shop if there's any comfort.