Eddie, I used to know a machinist who went "nuts" the first time he saw me using oil to drill with. He yelled at me to get some cutting fluid instead. I've never forgotten what he said, "Oil is for lubrication and cutting fluid is for cooling." I don't know if he was right, but I have a bottle of cutting fluid I use on anything heavier than sheet metal. I'm always afraid he'll yell at me again.
