Yeah, I haven’t actually tried keeping this around for longer than it takes to clean - it probably would go rancid, being just vegetable oil. Not exactly the same thing, but pretty close considering I didn’t know I was trying to make it.
As far as the lecithin, I thought it was to form an emulsion with the oil and water, which makes it easier to clean. Now I’m suddenly wondering if I was just wasting lecithin and it would work fine without it… gonna have to try and see how it goes, I conveniently have some beakers with traces of RSO downstairs waiting on my laziness. They’ll be waiting a while still, but next time I clean them I’ll see if the lecithin actually helps or not.