TexasCHLforum.com

No oil!

Apart from compromising the shape (molding) by softening the leather, it will make sticky on drawing because of the shape collapsing. Another negative is that oil will attach and hold dirt inside the holster causing more wear on the surface of the pistol, much like emery paper. Please don't do it.

If you are looking to decrease friction on the draw, you can use a wax/balm or for that matter, good old Turtle Wax that doesn't have any strange additives (it has to dry out completely). It will close the pores of the leather and provide a little bit of lubrication for drawing. Just make sure it dries well and is polished out.