got under my 1999 legacy. probably i had smoked one too many of some fine weed. or maybe four or five. i was puzzled, because usually changing the oil is dead easy on that subaru. where is the drain plug? finally i worked my way further and further back, and opened the drain, spilled a lot on the floor, but caught most of it in the pan.
couldn't figure out that funny little filter - didn't have one like it, so put it back on. filled crankcase with 4.4 l of fresh oil.
checked dipstick, oil right to the top of the stick!!! heck...I drained the tranny. called tow truck (AWD tranny in legacy, of course, so it needs to go right up on truck). checked into rehab, some time later, to clear the system out. it took 60 days to get a clear urine. total of 3 months in rehab. draining the tranny by mistake was nothing compared to that ordeal.
I just have 2 years left of my 5 year biological monitoring program.
Now, of course, I would just refill tranny, and drained crankcase.