Yep, nothing.
When you use oil on nonferrous metals it tends to gum up.
Plus the nonferrous metals are softer and don't make the heat the ferrous ones do.

 

Thank You for clearing that up for me.

 

I just did the "leave it running when drilling" trick!! Sure it blew molten chunks of sharp drill cuttings back at me, but HEY- no metal thru my turbo

It wasn't really that stupid; I drilled most of the way with the engine cold, then started it up just as the bit started thru. And if a guy takes his time threading the tap, you don't have to figure out how to remove chunks of broken hardened tap from your manifold