I just did an oil change on my car, and I used one of those 5L jugs (PP). My car takes 4L, and even though I was trying to be careful (poured a bit, then checked how much was left in the jug) I still ended up with a slight over fill. I don't think it is so much over full as to be a problem, but it still kind of bugs me; I like to put in what the spec calls for. In any case, I am looking for ideas: how do you guys measure out the correct amount of oil for your vehicles? I was thinking a big measuring cup/pitcher would be the thing; better yet, one with some kind of pour spout (like the spout I have which fits on Amsoil jugs)