I stumbled upon this months ago and never thought of sharing it with you guys since it seems like there is a lot of discussion about which oils to use I thought i would mention it.
It is called Zoom Spout Oiler: Turbine Oil LINK
This stuff is rediculously slippery. One drop on my lee breach lock press makes it rediculously smooth, I honestly can use my pinky to move it!
Now for sizing. All I do is fill a small sandwich baggy with .223 brass, but not too much so i can move the brass around. I add 3-4 drops of this stuff and mix the bras around by shaking it, you can do 2-3 bags full with only the 3-4 drops of oil. I have never had a case stuck.. Infact you can size 1-2 unlubed cases after sizing a lubed case, thats how good this oil is. You barely have to apply any force also.
So far I have loaded approximately 1200 rounds using this method. I have used maybe .1oz of this stuff, and it comes in a 4oz bottle for $4-5.
Also it has no ill effects on your reloads as all my reloads went bang, very accurately I might add.
Also I have only tried this with .223, since that and 9mm are all i reload.
I've been using it for decades for a general light oil, that and Tri-Flow.