Alisyn Valve/Slide/Key Oil

 Synthetic vs. regular
I switch over to synthetic oil 10-15 years ago - it is great. I have a bottle of this oil which is only half gone and it is my original bottle. I RARELY have to oil my valves and they have stayed in excellent condition with very little wear for the usage/age of my horn. One note: If you are going to switch to synthetic - get your instrument cleaned out entirely and never mix with regular rotary valve oil. I had a friend that went in my case and used my oil without asking and realizing it was synthetic and he froze up all his valves before a performance and had to take his instrument in for an entire cleaning.