Unless you're maintaining a machine gun, I can't see any reason to screw around with specialty oils. The only oil I recommend is ATF. Why? Because it is light weight, lots additives for wear prevention, and it is cheap. Doesn't matter a bit whether it is Dino or synthetic.
Now having said that, I loved the old FP10 because it kept my beater 1911 from rusting. But the new FP10 kindof sucks now because it doesn't stay where I put it. I like the smell of cinnamon so I'm working my way through a bottle Weapon Shield - but it isn't as good as FP10 (just smells better). Weapon Shield is non-toxic and made by little vegans that drink fair trade coffee.