I've been using Griot's Leather Care product on my black leather seats ... unf^&*#ing believable. Apply with your hands. Buff with a towel or brush. Leaves a 'leather' smell ... reminds me of a new saddle (tack room).
http://www.griotsgarage.com/catalog.jsp?L1=L1_1000&L2=L2_1006&SKU=11142
Not oily ... great on the steering wheel too ... nice 'grip'.
Give it a try.