"Wayne Whitney" wrote in message

OK, as you mention for spraying paint, this oil needs to be filtered
out. What about for air tools? Is the compressor oil comparable to
the air tool oil, so its presence in the air stream is a benefit?

If the oil is reaching\the tools, so is some of the water carried with it
canceling any benefits of the oil. You end up with gummed tools. Clean air
is always best.