According to this:

http://www.recorderhomepage.net/wood.html

Yamaha bore oil is basically the same as baby oil.

There's some offputting stuff here about drying oils like boiled linseed:

http://www.dolmetsch.com/recorderoil.htm

The fact that the stuff can spontaneously combust rags soaked in it (within minutes) was enough to put me off ever having it in the house.