I actually advise people against the use of oil in saw blades because over an extended sawing session, quite a bit of airborne oil particles end up in the lungs and could theoretically contribute to an oil embolism in the blood, since the aerosol is so fine adn can pass through the walls of the alveoli and directly into the blood. I prefer any coolant that has a known low toxicity. The type that ends up looking like a milky solution [since in this type of coolant wherein the oil is fully miscible with the water] is, in my opinion, better at cooling the blade , and lubricating it...than straight oil.
