Hi Kevin,
You are correct in saying that most of us use acrylics, which are matt, we do tend to use a very light base colour, I use Vallejo Sand, but any light colour will do, I don't do anything else to the surface and paint the oils on to the matt surface, for the oils I mix a colour approx to what I want the finished wood to look like then paint it on in the direction of the wood grain, I use a soft flat brush to keep working the oils until a grained look appears then just leave it well alone until the oils dry.
If like me you don't want to wait a week for the oils to dry try using Winsor and Newton Griffin Alkyd fast drying oil paints which will dry over night. HTH.
Cheers
Pete.