A lubricating oil composition comprising a) a lubricating oil, and b) a mixture of, based on the combined weight of i and ii, i) from 10 to 90 wt% of one or more alkylated hydroxydiphenylamine of formula III or V, wherein x is 0, 1 or 2 and y is 0, 1, 2 or 3, provided that at least one of x and y is other than 0; each R is independently C 1-24 alkyl, C 7-18 aralkyl, or C 4-24 alkyl substituted by one or more hydroxyl or interrupted by one or more oxygen atom, or two adjacent R groups together with the carbons to which they are attached form a 6 to 8 member non-aromatic carbocyclic ring, which non-aromatic carbocyclic ring is optionally substituted by C 1-4 alkyl, hydroxyl, or alkoxy; wherein at least one carbon atom adjacent to the amine nitrogen is unsubstituted; and ii) from 10 to 90 wt% of an alkylated diarylamine comprising one or more alkylated diphenylamines of the formula X: wherein x' is 1 or 2 and y' is 0, 1 or 2 and each R" independently from each other is C 1-24 alkyl; and wherein the mixture of b) is present in an amount of 0.1 to 5.0 wt%, based on the weight of the lubricating oil composition. a) a lubricating oil, and b) a mixture of, based on the combined weight of i and ii, i) from 10 to 90 wt% of one or more alkylated hydroxydiphenylamine of formula III or V, wherein x is 0, 1 or 2 and y is 0, 1, 2 or 3, provided that at least one of x and y is other than 0; each R is independently C 1-24 alkyl, C 7-18 aralkyl, or C 4-24 alkyl substituted by one or more hydroxyl or interrupted by one or more oxygen atom, or two adjacent R groups together with the carbons to which they are attached form a 6 to 8 member non-aromatic carbocyclic ring, which non-aromatic carbocyclic ring is optionally substituted by C 1-4 alkyl, hydroxyl, or alkoxy; wherein at least one carbon atom adjacent to the amine nitrogen is unsubstituted; and ii) from 10 to 90 wt% of an alkylated diarylamine comprising one or more alkylated diphenylamines of the formula X: wherein x' is 1 or 2 and y' is 0, 1 or 2 and each R" independently from each other is C 1-24 alkyl; and wherein the mixture of b) is present in an amount of 0.1 to 5.0 wt%, based on the weight of the lubricating oil composition. i) from 10 to 90 wt% of one or more alkylated hydroxydiphenylamine of formula III or V, wherein x is 0, 1 or 2 and y is 0, 1, 2 or 3, provided that at least one of x and y is other than 0; each R is independently C 1-24 alkyl, C 7-18 aralkyl, or C 4-24 alkyl substituted by one or more hydroxyl or interrupted by one or more oxygen atom, or two adjacent R groups together with the carbons to which they are attached form a 6 to 8 member non-aromatic carbocyclic ring, which non-aromatic carbocyclic ring is optionally substituted by C 1-4 alkyl, hydroxyl, or alkoxy; wherein at least one carbon atom adjacent to the amine nitrogen is unsubstituted; and wherein x is 0, 1 or 2 and y is 0, 1, 2 or 3, provided that at least one of x and y is other than 0; each R is independently C 1-24 alkyl, C 7-18 aralkyl, or C 4-24 alkyl substituted by one or more hydroxyl or interrupted by one or more oxygen atom, or two adjacent R groups together with the carbons to which they are attached form a 6 to 8 member non-aromatic carbocyclic ring, which non-aromatic carbocyclic ring is optionally substituted by C 1-4 alkyl, hydroxyl, or alkoxy; wherein at least one carbon atom adjacent to the amine nitrogen is unsubstituted; and ii) from 10 to 90 wt% of an alkylated diarylamine comprising one or more alkylated diphenylamines of the formula X: wherein x' is 1 or 2 and y' is 0, 1 or 2 and each R" independently from each other is C 1-24 alkyl; and wherein the mixture of b) is present in an amount of 0.1 to 5.0 wt%, based on the weight of the lubricating oil composition. wherein x' is 1 or 2 and y' is 0, 1 or 2 and each R" independently from each other is C 1-24 alkyl; and wherein the mixture of b) is present in an amount of 0.1 to 5.0 wt%, based on the weight of the lubricating oil composition.