| abstract |
An improved transparent lubricating oil composition, e.g. useful as a high severity metal cutting oil, and a method of metal working using said composition, the composition comprising a major amount of oil of lubricating viscosity; a minor, effective amount of at least one sulfur-containing compound; and a minor effective amount of elemental sulfur; both the sulfur-containing compound and the sulfur being present in amounts to be soluble in the composition and the combination of sulfur-containing compound and elemental sulfur being present in an amount effective to improve the extreme pressure properties of the composition. |