What is neat oil?, What is neat cutting oil?
Neat oil is a 100% petroleum or synthetic oil used straight, with no dilution, for machining, that offers high lubricity for tapping, reaming, and threading.
What can I use for cutting oil?
Commercial cutting oils, sulfurized mineral oil, and synthetic ester oils can all be used for cutting oil. In a pinch, light machine oil can work for low-demand machining operations.