I found that if I apply a drop of this after (!) each time I play, before putting the horn in the case, I didn't have to oil at all during rehearsals or gigs.
Completely odor-free.
It doesn't seem to evaporate/disappear as quickly as lighter oils, so I imagine this would be perfect for long-term storage of the instrument.
The valves do seem to run a tiny bit faster if I use the Yamaha Light oil, so for new instruments with tight tolerances, you might consider that instead.