Ore patches will always stay full. Works for vanilla and modded gameplay, allowing for infinite ores in them as well.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Play it your way.
Does this also work for oil holes, and other "oil" like holes added by mods?
It should, oil and other things of that sort work in a combined yield. I have not heard of any complaints related to that.