Synthetic lubricants are not new breeds of fluids which were suddenly developed because of scarce petroleum oils. They have been available for many years and utilized as lubricants for diversified ranges of specialized applications. These specific fluids were developed with tailored physical and chemical properties best suited to the severe demands of equipment operating under wide temperature ranges and other hostile environments.This paper will cover applications on earthmoving equipment such as gear lubrication, hydraulic and torque convertor fluid, engine oils and greases exposed to wide temperature ranges and, especially, low temperatures.Large, heavy duty earthmoving equipment is being exposed to very low temperature environments, as low as -65°F in some remote areas of the world. This demands lubricants that have better low temperature properties than found in petroleum base types. This paper will cover only those that are best suited to this area of application and those which are economical and readily available.