i usually have some of the extra virgin olive oil around for cooking, so I've used that, but to be honest I don't think it makes all that much difference. It just works well for cleaning up oil based paint without harsh chemicals. especially on the hands.

And to tell you the truth GDC, it's been so long since I experienced ANYTHING virgin that I'm not sure I could tell the difference. Bill Clinton said in his cooking class, "Just how do you define virgin?"