Cant seem to satisfactorily get oil out via dipstick tube. Eng. is a 2001 5.0,new to me, dipstick tube does not go to bottom of base, only a 1/4 tube will fit down dip.hole and in to oil; and my manual standup 8 litre plastic vacuum sucker doesnt seem up to the task. Am getting 24 inches of vac., it will only just draw a trickle. takes so long engine cooled down and im still only half done.Looking for better ideas,hopefully not involving pulling engine and installing a real drain.