Fretters: i love talking about ways to make steel shine and not rust so i'm moving our conversation about Boiled linseed oil over here from the Vise thread since you seem to know so much about the subject. here is the last posting i copied and pasted to here from there.
It's not a case of being knowledgable, but rather the fact that I'm one of those weird types who is quite drawn to experimenting, (and risking the occasional failures, setbacks and small disasters which are part and parcel of that process

), to find out how things behave under certain conditions. Some might just call it masochism.
so what would be the advantage to using regular linseed oil instead of boiled version if your thinning the regular kind produces something like the boiled?
Control of the liquids behaviour would be the main answer to that. The secondary reason is that if I want to add driers to the liquid to aid curing, that's something I can do myself. That's not an option with boiled, as they're already in there, by all acounts. From the fragmented information regarding linseed oil, it appears that the boiled is literally boiled to thicken it, (in similar vein to caramelising sugar), and then solvent is added to thin it back out, then driers are added to hasten the drying. Using raw, you have more control over how it behaves. You can use solvent and/or driers if desired, but you can also keep it raw when adding it to something, (one prime example of use in this context would be paint), to retain a certain amount of fluidity, so that the coating would creep, if damaged.
Regarding shelf life, I would actually guess that the boiled would have a longer shelf life, due to the driers. Those should, theoretically, discourage bacterial growth, which is where raw potentially could suffer, (though I've never actually witnessed that happening myself), if being stored long term. Both raw and boiled would obviously cure eventually if not kept well sealed too. With regards the minute prospect of bacterial growth, that was also one of the reasons, though not the primary one, for my using gum turpentine in the mix. It's a natural antibacterial.