The oil is finally ready for its first test. It seems heavy enough to serve as a high quality weapon oil.
The only way to find out is to have a professional try it out. See Grek over there by the wanted posters? Sure, he's no poet, but the orc knows his way around a weapon!
Take a sample of the oil to him and ask him to use it on his weapon. After he's had a chance to test it out, let me know what he thinks of it.