Remember if you pull 1ml of oil into a pin, it will only read .9ml because a full .1ml will be inside the needle itself. If you use a draw needle and don't pull anything out of it (even if you do a tinny bit will be left behind) you will lose up to another .1ml.
A small air bubble pulled into the syringe will clear out the needle and push most of that .1m in, I suggest reading up on this technique before trying it.