We always get a lot of questions from new students and beginning band parents on how to oil their trumpet valves. Well, now we have a video for you! Check out the video for a demonstration. The importance of oiling trumpet valves is two-fold. The long term benefit of oiling your trumpet valves is that it helps to extend the life of the valves. The short term benefit is that it facilitates technique. Players should oil their valves before practice sessions and performances.