After a 50+ year hiatus I started playing again. Bought 3 used higher end horns: The obligatory Strad 37 Trumpet, Getzen Eterna Trumpet and a mint Getzen Capri Cornet. I have been using UltraPure valve oil. My Cornet requires reoiling after half hour of playing. Now I am playing H. L. Clarke stuff which is very rapid fingering. Just ordered Monster Oil on well respected recommendations. Any thoughts?