drain it asap,
there should be no damage done, even if you ran the engine
but once you add the oil and run the engine for about 10 minutes, check the oil (the dipstick and the oil cap) if its a yellow/white cream color then there is still water in there
in which case you'll have to drain it again and add new oil, i doubt this will happen but you want to be sure because water will start to rust your cams/pistons/lifters and you do not want that to happen
If you haven't started the engine yet,just drain the oil and put in fresh oil,there's no need to change oil filter because oil hasn't traveled through filter yet.If you have started the engine,drain the oil,replace the oil filter and add fresh oil.No harm has been done yet
Not yet drain it out and put a new oil filter and oil
