Oil for mechanical gearboxes, designed for lubricating highly-loaded mechanical gearboxes in industrial equipment, often transmitting shock loads, such as in construction machinery, machinery used in the mining industry, and other equipment, with operating temperatures up to 120°C. Used in gearboxes requiring oils with increased load-bearing capacity of the lubricating film (oils containing EP additives), good thermo-oxidative stability with the required anti-corrosion properties (for iron and non-ferrous metals).