In the "olden days" the oils used to lubricate guns on the frontier were mostly animal fats, whale oil, tallow, lard, etc. I think today most people since we are so used to mineral oils, would be a bit put off. I have handled old rifles that spent most of their lives in the house rather than the woods, which survived the years in excellent condition, and were likely shot recreationally, and very well cleaned and taken care of. On the other hand I have seen rifles that likely spent a good deal of their lives out on the range, and show all the indications of such a life.