Yogi, At the risk of beating a dead or dying horse, I would suggest that the Minwax Antique Oil, the product I have most personal experience with, is indeed linseed based and in fact is the exact combination of components and finishing qualities you seek to achieve with your field expedient mixture. I suppose the question then becomes whether experienced paint chemists can do a better job of compounding than I can by winging it. Personal experience and common sense suggests a clear answer for me. Your view may be different, but it will be an interesting journey in any case.