SC - walnut oil

[Karen Farris]

     Would any of you illustrious chefs inform a poor French peasant girl 
     of the periodicity of walnut oil?  What about other nut oils or 
     vegetable oils?  Is there script of any other than animal lards and 
     olive oil?
     
     Also, if one wanted to add walnuts to said oil...purely for 
     presentation purposes, would it keep if stoppered for a period of 
     time?  Would the walnuts have to be toasted or otherwise treated?
     
     Lillian Clare du Chateauroux
     Dragonspine, Outlands
     
     -who's done basic feastcratting and would like to expand her 
     horizons...