Gulf Super Tractor Oil Universal series are multifunctional tractor lubricants designed for use in a wide variety of modern farm equipment. These oils are blended from specially selected base stocks and advanced additive package to provide reliable performance in wide range of farming applications. These high performance STOU oils are suitable for use in diesel/gasoline engines, conventional gear drives, powershift transmissions, hydrostatic transmissions, hydraulics, final drives, power steering systems and oilimmersed brakes operating in agricultural services. These oils are available in SAE 10W-30, 10W-40, 15W-30, 15W-40, 20W-40 and 20W-50 grades to enable the users to select an appropriate viscosity grade as recommended by farm equipment manufacturers for optimum performance.