The world's No.1 Wood Conditioner, only few drops will make a difference!
A friend of mine in the Atlanta area, L.Omar Henderson, PhD., is a research chemist who also plays a clarinet made from Grenadilla wood. He has extensively researched the topic of bore oils, consulting with conservators in many European and American museums as well as principal musicians in major orchestras. This is what he has to say on the topic of bore oils:
Extensive research has shown that processed oils and waxes (most bore oils) actually clog the pores and fine structure of the wood fibers and hinder the transfer of moisture to the wood structure, while certain natural oils and antioxidants nourish and preserve the wood and the fine tonal qualities of wood instruments over the years. A proper water balance is necessary for the resonant qualities of wood instruments but too much or too little (and even the rapid flux ) can cause changes in resonance and the tendency to warp, split or crack the wood. Bore Doctor™ will not dull the tonal qualities of your instrument! Inexpensive insurance for your wood prone to cracking or splitting.
I have researched the particular qualities and chemical structures of more than 100 plant oils, many types of plant antioxidant molecules (vitamin E is only a fair antioxidant and works best in animal - not plant systems), and many natural plant oil emulsifiers (different oils will separate over time and especially when absorbed into a cellulose matrix (e.g. wood). I have formulated a mixture of more common plant oils and some pretty exotic oils, natural plant antioxidant molecules, and natural plant emulsifiers in a proprietary formulation. At ambient room temperatures and even in my collection of quality control samples, there is no change in stability, color, no development of rancidity or foul odors and effectiveness, in samples now 7 years old (when I first settled on a perfected formulation).
This especially formulated, all natural blend of expensive non-toxic exotic oils, antioxidants, and stabilizers, controls the dimensional stability and water balance of fine wood instruments. It really, thoroughly soaks into the wood. Water is both the enemy and the friend of fine wood musical instruments and controlling the water sorption and description of (amount entering and leaving) the wood adds dimensional stability, retards the tendency to crack or split, prevents water logging, and improves the overall tone of the instrument. Your fine wood instrument should last many years with proper care. Especially good for dry environments - necessary for damp climates. Most bore oils on the market are cheap mineral oils!