I don't think they put a lot of oil on top. I know the oil filter only filters about a 1/3 of the oil if that. Don't make the mistake of changeing one of the lines to a larger one to get more oil. You may get more oil in one area, but will most likely lose it in another. These lines are engineered so that you get the right amout of oil in each needed area without loss of oil pressure. Just some food for thought. Cecil.....