you prolly have the oil coming from the exhaust....which engine are you beaking in?...if its a .18 .16 put your high at 2 1/2 out you low flush with the collar....if its a .21 or .28 2 1/2 out on the high speed needle and 3 1/2 out on the low...basically the .16 and .18 collar is approx 3 1/2 out...if you go flush with the collar on a .21 or .28 your to far out...here is a pic to help u out