Use of a lubricating composition as a lubricant for increasing resistance to spalling of metal frictional parts, said lubricating composition comprising: (a) from 60 to 90 % by weight of one or more base oils, of mineral, synthetic or natural origin, (b) at least one anti-wear and extreme pressure phosphorous or sulfur-phosphorous additive, (c) 0.1 to 2% by weight of at least one anti-wear and extreme pressure sulfur-containing additive (c), said additive (c) is selected from one or more sulfurized olefins fitting the general formula R1-Sx-R2, wherein R1 and R2 are alkyl groups including from 3 to 15 carbon atoms and x is an integer comprised between 2 and 6 and said sulfur-containing additive (c) has a ratio between the active sulfur mass content at 150°C, as measured according to the ASTM D1662 standard, and the elementary sulfur mass content, as measured according to the ASTM D5185 standard, SactivelS, less than 0.45 and an elementary sulfur mass content, as measured according to the ASTM D5185 standard, larger than 20%, and wherein: - the ratio between the elementary sulfur mass content, as measured according to the ASTM D2622 standard, and the elementary phosphorus mass content, as measured according to the ASTM D5185 standard, S / P, of said lubricating composition, is comprised between 20 and 40, preferably between 25 and 35; - the ratio between the active sulfur mass content at 150°C, as measured according to the ASTM D1662 standard, and the elementary sulfur mass content, as measured according to the ASTM D5185 standard, SactivelS, of said lubricating composition, is less than 0.34, preferentially less than 0.33. (a) from 60 to 90 % by weight of one or more base oils, of mineral, synthetic or natural origin, (b) at least one anti-wear and extreme pressure phosphorous or sulfur-phosphorous additive, (c) 0.1 to 2% by weight of at least one anti-wear and extreme pressure sulfur-containing additive (c), said additive (c) is selected from one or more sulfurized olefins fitting the general formula R1-Sx-R2, wherein R1 and R2 are alkyl groups including from 3 to 15 carbon atoms and x is an integer comprised between 2 and 6 and said sulfur-containing additive (c) has a ratio between the active sulfur mass content at 150°C, as measured according to the ASTM D1662 standard, and the elementary sulfur mass content, as measured according to the ASTM D5185 standard, SactivelS, less than 0.45 and an elementary sulfur mass content, as measured according to the ASTM D5185 standard, larger than 20%, and wherein: - the ratio between the elementary sulfur mass content, as measured according to the ASTM D2622 standard, and the elementary phosphorus mass content, as measured according to the ASTM D5185 standard, S / P, of said lubricating composition, is comprised between 20 and 40, preferably between 25 and 35; - the ratio between the active sulfur mass content at 150°C, as measured according to the ASTM D1662 standard, and the elementary sulfur mass content, as measured according to the ASTM D5185 standard, SactivelS, of said lubricating composition, is less than 0.34, preferentially less than 0.33. - the ratio between the elementary sulfur mass content, as measured according to the ASTM D2622 standard, and the elementary phosphorus mass content, as measured according to the ASTM D5185 standard, S / P, of said lubricating composition, is comprised between 20 and 40, preferably between 25 and 35; - the ratio between the active sulfur mass content at 150°C, as measured according to the ASTM D1662 standard, and the elementary sulfur mass content, as measured according to the ASTM D5185 standard, SactivelS, of said lubricating composition, is less than 0.34, preferentially less than 0.33.