coolant question for you experts

i posted this in the jaguar forum also but i thought it may be also a more general question...
http://www.automotiveforums.com/vbulletin/showthread.php?p=4345340#post4345340

I have seen a cooling system suppliment that fits your description. NAPA used to have Mac's 13. It is basicly water soluable oil that looks like the same stuff circulated on machine shop equipment to wash and cool parts that are being cut.

im just replying in the jag post btw.