M_Boats: wood oil

My M17 does not have varnished or painted exterior teak. I have been using teak oil on the wood but am not very happy with the results. The teak oil does not seem to last long and so needs to be applied often. I came across a product called Uncle Billy's Wood Oil based on pine tar. It is sold on the American Rope and Tar web page. Does anyone have any experiance with this product? Tom M17 Obsessus