Apply the oil evenly across the surface with either a clean disposable towel or your hand. Let the product impregnate the wood for 10 minutes, and then wipe off any excess oil from the surface. If you have a reversible surface, repeat the process on the other side.
If your surface is used heavily on a daily basis, repeat this process every week. For moderate use, repeat the process every 4 to 6 weeks.
Below is a short video tutorial on how to apply Board Cream, but the application procedure is very much similar for Mystery Oil. Just don't use your hand in this case: Use a disposable towel.