I have been playing with the medium: Meglip by Gamblin. This is an awesome medium, which makes the paint malleable without making it soupy. I have been using it for a while now and would recommend it to anybody who does not like the soupy feel from linseed, safflower, walnut oil, clove oil etc. after you add a little more than desired. Some people compare to maroger, but I have not used maroger yet.
Faisal