Truegard Soluble 384 is the go to soluble oil for versatile metalworking applications. This multi-purpose heavy duty oil can machine aluminum alloys, titanium, Inconel, stainless steel, and all automotive steels. At Keller-Heartt Oil, we are proud to carry TRUEGARD soluble 384 oil in 275 gallon totes for high volume metalworking applications. TRUEGARD Soluble 384 is a general purpose soluble oil for light to moderate duty machining on a wide range of materials. TRUEGARD Soluble 384 oil is high mineral oil containing soluble for easy to medium duty machining, including grinding, on a wide variety of materials including as well ferrous as non-ferrous metals.