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 (I) 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 (I) 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; <EOS>