Damn... some people actually sell veggie oil as gun lube, FFS? One born every minute, I guess!
I once "oiled" my pocket knife (Spyderco) with canola oil, because it was used primarily for cutting food and peeling fruit and I didn't want to eat any smelly chemicals of the "3 in 1" oil that works exceptionally well (it was my "lunch at work" knife, lol). In any case, after about two weeks or so, the knife became very hard to open and developed a smell of stale oil. Upon inspection, it was gummed up inside and required a throughout cleaning with WD40 to restore functionality and eliminate the sticky canola oil residue on moving parts... and it was never exposed to any UV rays, by the way. Just air.
That being said, I would NEVER put vegetable oil in a gun unless it was some sort of a survival emergency and I had no other option, as it would more than likely gum up the sh*t out of the internals... and the whole idea sounds like some southern good'ole boys' poor attempt at a scam (pump veggie oil into tiny bottles and sell off as gun lube for a HUGE premium!).
What's next? "High performance" vegetable engine oil for cars??? How dumb can some people be, lol...
I think the canola was polymerizing over time, I have seen hot pipes leaking canola look like they were covered in silicone rubber after a few weeks , it was all rubbery but crumbly. I think it was oxidizing. a different oil like coconut oil is much more resistant to oxidation.
