Sulfurized olefin extreme pressure/antiwear additives and compositions thereof

A process for preparing a product of reaction, having no or substantially no dithiolethiones, suitable for use in oils of lubricating viscosity or greases prepared therefrom comprising (a) reacting (a) elemental sulfur and an alkali metal sulfide or (b) alkali metal sulfide hydrate or mixture thereof in a molar ratio of sulfur to sulfide, ranging from about 10.1 to about 0.5:1, at pressures varying from about 100 to about 850 psi, at temperatures ranging from about 185.degree. to about 500.degree. F. and times ranging from about 0.5 hours to about 24 hours or more and thereafter (2) reacting the product of (1) and C.sub.2 to about a C.sub.32 olefin or mixture of olefins in a molar ratio of sulfur plus sulfide to olefin of from about 5:1 to about 1:1 at the same or slightly lower or higher temperatures, pressures and reaction times, and recovering a liquid product having about 35% to 60% by weight sulfur.