As some body said here, my e cig spend more time in my mouth than my tongue but I I have never have overpassed 3 ml.
3 ml a day,and i mean not beyond probably 1.5 ml a day3ml for the whole week? Nice
I can't tell for certain without looking but I think I may go through at most 30ml a week. I'm using the 510 and they say it's greedy on the juice. I go through about 5 batteries a day (I only have 2, I just mean that much such they are rotated out when one goes dead).