A turbocharger for an engine system , comprising: a compressor housing including a compressor inlet and a compressor outlet ; a turbine housing including a turbine inlet , a turbine wheel and a turbine outlet ; a center housing connected between the compressor housing and the turbine housing ; and a shaft supported in the center housing , the shaft extending in a longitudinal direction of the turbocharger , wherein the turbine inlet includes a first mounting interface for connecting the turbocharger to an exhaust system of the engine system , wherein the turbine outlet includes a second mounting interface for connecting the turbocharger to an exhaust aftertreatment system of the engine system , wherein the center housing includes an oil outlet disposed below the shaft for draining lubricant from the same, characterized in that the first mounting interface faces in a first direction (d1) perpendicular to the longitudinal direction , the second mounting interface faces in a second direction (d2) that extends at a first predetermined angle (α) with respect to the plane defined by the longitudinal direction and the first direction (d1), wherein a substantially plane mounting surface is provided around an oil outlet opening of the oil outlet , and a flange mounting portion configured for mounting a drain flange to the same, the flange mounting portion including a pair of mounting structures arranged opposite to each other on both sides of the oil outlet opening along a fourth direction (d4), wherein the substantially plane mounting surface extends at a third predetermined angle (δ) with respect to the plane orthogonal to the first direction (d1), and wherein the fourth direction (d4) extends at a fourth predetermined angle (ε) with respect to a center plane (p) of the center housing that is perpendicular to the longitudinal direction . a compressor housing including a compressor inlet and a compressor outlet ; a turbine housing including a turbine inlet , a turbine wheel and a turbine outlet ; a center housing connected between the compressor housing and the turbine housing ; and a shaft supported in the center housing , the shaft extending in a longitudinal direction of the turbocharger , wherein the turbine inlet includes a first mounting interface for connecting the turbocharger to an exhaust system of the engine system , wherein the turbine outlet includes a second mounting interface for connecting the turbocharger to an exhaust aftertreatment system of the engine system , wherein the center housing includes an oil outlet disposed below the shaft for draining lubricant from the same, characterized in that the first mounting interface faces in a first direction (d1) perpendicular to the longitudinal direction , the second mounting interface faces in a second direction (d2) that extends at a first predetermined angle (α) with respect to the plane defined by the longitudinal direction and the first direction (d1), wherein a substantially plane mounting surface is provided around an oil outlet opening of the oil outlet , and a flange mounting portion configured for mounting a drain flange to the same, the flange mounting portion including a pair of mounting structures arranged opposite to each other on both sides of the oil outlet opening along a fourth direction (d4), wherein the substantially plane mounting surface extends at a third predetermined angle (δ) with respect to the plane orthogonal to the first direction (d1), and wherein the fourth direction (d4) extends at a fourth predetermined angle (ε) with respect to a center plane (p) of the center housing that is perpendicular to the longitudinal direction . <EOS>