The question wasn't specifically premised on anything you have done or have said since I had no knowledge of your actions or opinions at the time I posted on the thread."Anti-oxidant" in that context is talking about preventing the oil from oxidizing, not preventing corrosion.Which firearm manufacturer recommends motor oil for use on their products?Some time ago, I did an MSDS study of Mobil 1 and BreakFree CLP. I was curious because so many people seem to think that Mobil 1 was a much better lubricant than BreakFree CLP. Turns out that the actual oil base in both BreakFree CLP and Mobil 1 were identical. It was only the additive package that was different. If there's a difference in how well the two perform in terms of lubrication, it's not due to the Mobil 1 having a superior oil as its primary ingredient.
As far as the rest, the good quality gun specific products will significantly outperform motor oil in terms of corrosion protection. If Grant Cunningham's article isn't sufficiently convincing, there are many informal corrosion tests on the internet which confirm that motor oil is a poor choice for corrosion protection.Actually, if you poke around, it's not too hard to find a good CLP that is as good or better at lubricating than motor oil, nearly as good as the best protectants and better than some solvents at cleaning.
I know most people have already made up their minds on this topic, but for those who are interested in learning, the thread below contains a lot of information that challenges some of the conventional "wisdom" about lubrication and corrosion protection.
https://thefiringline.com/forums/showthread.php?t=546316