A gear oil composition having a kinematic viscosity at 40 °C in the range of ≥ 135 to ≤ 750 cSt when measured in accordance with ASTM D445, the gear oil composition comprising a) ≥ 20.0 wt.% of at least one alkoxylated polytetrahydrofuran of the general formula having a kinematic viscosity at 40 °C in the range of ≥ 700 to ≤ 1300 cSt, as determined in accordance with ASTM D445, wherein m is in the range of ≥ 1 to ≤ 50, m' is in the range of ≥ 1 to ≤ 50, (m+m') is in the range of ≥ 1 to ≤ 90 n is in the range of ≥ 0 to ≤ 75, n' is in the range of ≥ 0 to ≤ 75, (n+n') is in the range of ≥ 0 to ≤ 90, k is in the range of ≥ 2 to ≤ 30, R 1 denotes an unsubstituted, linear or branched, C 6, C 7, C 8, C 9, C 10, C 11, C 12, C 13, C 14, C 15, C 16, C 17, C 18, C 19, C 20, C 21, C 22, C 23, C 24, C 25, C 26, C 27 or C 28 alkyl, R 2 denotes CH 2 -CH 3, CH 3 or H, and R 3 and R 4 denote, identical or different, substituted or unsubstituted, linear or branched C 1, C 2, C 3, C 4, C 5 alkyl or H, wherein the concatenations denoted by k are distributed to form a block polymeric structure and the concatenations denoted by n, n', m and m' are distributed to form a block polymeric structure or a random polymeric structure; and b) ≥ 6.0 wt.% to ≤ 76.0 wt.% of at least one polyalphaolefin having a kinematic viscosity at 40 °C in the range of ≥ 16 to ≤ 60 cSt as determined in accordance with ASTM D445; wherein the wt.% are based on the total weight of the gear oil composition. a) ≥ 20.0 wt.% of at least one alkoxylated polytetrahydrofuran of the general formula having a kinematic viscosity at 40 °C in the range of ≥ 700 to ≤ 1300 cSt, as determined in accordance with ASTM D445, wherein m is in the range of ≥ 1 to ≤ 50, m' is in the range of ≥ 1 to ≤ 50, (m+m') is in the range of ≥ 1 to ≤ 90 n is in the range of ≥ 0 to ≤ 75, n' is in the range of ≥ 0 to ≤ 75, (n+n') is in the range of ≥ 0 to ≤ 90, k is in the range of ≥ 2 to ≤ 30, R 1 denotes an unsubstituted, linear or branched, C 6, C 7, C 8, C 9, C 10, C 11, C 12, C 13, C 14, C 15, C 16, C 17, C 18, C 19, C 20, C 21, C 22, C 23, C 24, C 25, C 26, C 27 or C 28 alkyl, R 2 denotes CH 2 -CH 3, CH 3 or H, and R 3 and R 4 denote, identical or different, substituted or unsubstituted, linear or branched C 1, C 2, C 3, C 4, C 5 alkyl or H, wherein the concatenations denoted by k are distributed to form a block polymeric structure and the concatenations denoted by n, n', m and m' are distributed to form a block polymeric structure or a random polymeric structure; and m is in the range of ≥ 1 to ≤ 50, m' is in the range of ≥ 1 to ≤ 50, (m+m') is in the range of ≥ 1 to ≤ 90 n is in the range of ≥ 0 to ≤ 75, n' is in the range of ≥ 0 to ≤ 75, (n+n') is in the range of ≥ 0 to ≤ 90, k is in the range of ≥ 2 to ≤ 30, R 1 denotes an unsubstituted, linear or branched, C 6, C 7, C 8, C 9, C 10, C 11, C 12, C 13, C 14, C 15, C 16, C 17, C 18, C 19, C 20, C 21, C 22, C 23, C 24, C 25, C 26, C 27 or C 28 alkyl, R 2 denotes CH 2 -CH 3, CH 3 or H, and R 3 and R 4 denote, identical or different, substituted or unsubstituted, linear or branched C 1, C 2, C 3, C 4, C 5 alkyl or H, wherein the concatenations denoted by k are distributed to form a block polymeric structure and the concatenations denoted by n, n', m and m' are distributed to form a block polymeric structure or a random polymeric structure; and b) ≥ 6.0 wt.% to ≤ 76.0 wt.% of at least one polyalphaolefin having a kinematic viscosity at 40 °C in the range of ≥ 16 to ≤ 60 cSt as determined in accordance with ASTM D445;