Overall quality has shifted over time. Many Chinese-made double horns today are built better than older Chinese models and now match or even exceed the quality of American horns from decades ago. At the same time, some American-made horns seem to have declined in craftsmanship[.][https://share ...

That’s a really solid and well-thought-out approach. It’s clear you’ve matched each oil to how the instrument and valves actually behave, not just the brand name. Your experience with Yamaha Vintage Synthetic turning sticky mirrors what many players report, and the long-term success with Al Cass on ...