Mineral lubricant of the UTTO type (Universal Tractor Transmission Oil) indicated for the lubrication of transmissions, oil bath brakes, power take-offs and hydraulic systems of off-road machines (tractors, agricultural equipment and earth moving machines). Protects against rust and corrosion, allowing the correct operation of circuits where the appearance of such actions can take place due to unavoidable water condensation. Additivation suitable for the correct operation of the brakes in an oil bath, avoiding noise and vibrations and allowing a long conservation of the mechanical parts.