you could drain all the oil or fill it all the way up. when i worked at jiffy lube we had some mexican guys come rolling up in a toyota celica that was smoking like crazy. i could see oil dripping, more like pouring out of the bottom of their car. they said they changed the oil and did everything right and now it doesnt run right. so i asked them how much oil they put in it and they said i dont know he just filled it up to the top (the top of the oil fill hole). i just told them to take it to a mechanic because i wasnt about to lose my job over some idiots blown up car.