A lot of luthiers use this oil for dry rosewood and laurel fretboards.
Darkens it up nicely. Better than the Dunlop Lemon (its not lemon, only scent) oil.
You only need a few drops, so it wil last a long time. I'm gonna throw my Dunlop lemon oil in the bin and use this Bore Oil (same as Fret Doctor, but way cheaper) from now on.