You may be right, but what I came to know during my online search is that it takes 3.3 L with filter. I also also own a Lancer 1.3 GLX. When I put 4 L in it, its gauge shows 'over'. Then normally I used to fill it with 3.5 L. During my last oil change, I filled it with 3.25 L.
BTW, as you said that when we change the oil, not all the previous oil comes out, then it means that the new quantity of oil should be as much less, no?