It seems that the problem is either totally innocuous or totally catastrophic. Either way, it isn't likely to get worse. Since the oil in the motor is clean and the oil in the radiator doesn't seem to be bothering anyone, and the fact that my office is 1.8 miles from home, I'll just ignore it for now and revisit the issue if it gets worse. Thanks again for all the input and I'll update the post when/if I discover the source of the mystery oil.
Bob J
