There is a Tutorial on making your own preshave oil over in the Tutorials forum. I make my own with equal parts olive oil and castor oil and a couple drops of EO or FO to smell nice.
http://theshaveden.com/forums/threa...oil-and-does-it-affect-the-shave-brush.28277/ http://badgerandblade.com/vb/archive/index.php/t-87804.html