lubrication of slides with lamp oil

[toobagrowl]

Keep in mind you have the expertise AND tools/machinery to 'tweak' your tubas perfect. 99+% of tuba players don't have the expertise or 24/7 access to such tooling to do that with their tubas
That said, I'm not sure I want my top slides loose and trombone-like, where they can fall out if put on the bell. And I don't wanna mess with those stupid strings/laces on my top slides.
Thick oil or grease works for my slides

[roweenie]

I wonder if lamp oil would be better than mineral oil when mixed with lanolin, or might it be too thin?

[Dan Schultz]

Nose grease is an outstanding lubricant for fly rod ferrules.

[roweenie]

Nose grease is an outstanding lubricant for fly rod ferrules

Perdonally, I prefer to smear it on my telescope lenses, and occasionally use it to remove excess head from my beer.