Getzen should have included oil with the trumpet - they did with mine. Why not talk to them? If that is not a logical option I use and recommend Ultra Pure in both my Getzens - a 700S Eterna II and a Classic 900. I use it all my other trumpets too Harrelson Bravura, B&H Regent MkII, Weril Pocket EP4071, and also in an ancient B&H Sovereign Tenor Horn. I used to use Al Cass' FAST but I now only carry a bottle for the youngsters in the Band who have "forgotten" to oil.