Oil temperature management assembly comprising: i) a heat exchanger; ii) a support body for supporting the heat exchanger comprising at least one duct having at least one inlet mouth, at least one outlet mouth and, on the side wall delimiting it, at least one exchanger mouth through which the oil flows in the exchanger; iii) a valve group housed in the duct extending in length along an axis (X-X) and comprising: - a valve body which extends along the axis (X-X) axially fixed to the support body; - an obturator which extends along the axis (X-X) fitted, axially movable, on the valve body, having: • a primary obturator opening and a secondary obturator opening (153") axially spaced from each other through which the oil flows towards the heat exchanger when positioned respectively facing the exchanger mouth, in a first operating configuration and a third operating configuration; • an outlet opening through which the oil flows when the obturator is placed in a second operating configuration and/or in a venting configuration; - obturator positioning and movement means comprising: • a temperature sensitive device engaging the obturator to guide it, depending on the oil temperature, into an axial position corresponding to the second or third operating configuration; • a pressure sensitive device suitable to keep the obturator in an axial position corresponding to the first operating configuration and to allow the movement thereof, depending on the oil pressure, in an axial position corresponding to the venting configuration. i) a heat exchanger; ii) a support body for supporting the heat exchanger comprising at least one duct having at least one inlet mouth, at least one outlet mouth and, on the side wall delimiting it, at least one exchanger mouth through which the oil flows in the exchanger; iii) a valve group housed in the duct extending in length along an axis (X-X) and comprising: - a valve body which extends along the axis (X-X) axially fixed to the support body; - an obturator which extends along the axis (X-X) fitted, axially movable, on the valve body, having: • a primary obturator opening and a secondary obturator opening (153") axially spaced from each other through which the oil flows towards the heat exchanger when positioned respectively facing the exchanger mouth, in a first operating configuration and a third operating configuration; • an outlet opening through which the oil flows when the obturator is placed in a second operating configuration and/or in a venting configuration; - obturator positioning and movement means comprising: • a temperature sensitive device engaging the obturator to guide it, depending on the oil temperature, into an axial position corresponding to the second or third operating configuration; • a pressure sensitive device suitable to keep the obturator in an axial position corresponding to the first operating configuration and to allow the movement thereof, depending on the oil pressure, in an axial position corresponding to the venting configuration. - a valve body which extends along the axis (X-X) axially fixed to the support body; - an obturator which extends along the axis (X-X) fitted, axially movable, on the valve body, having: • a primary obturator opening and a secondary obturator opening (153") axially spaced from each other through which the oil flows towards the heat exchanger when positioned respectively facing the exchanger mouth, in a first operating configuration and a third operating configuration; • an outlet opening through which the oil flows when the obturator is placed in a second operating configuration and/or in a venting configuration; • a primary obturator opening and a secondary obturator opening (153") axially spaced from each other through which the oil flows towards the heat exchanger when positioned respectively facing the exchanger mouth, in a first operating configuration and a third operating configuration; • an outlet opening through which the oil flows when the obturator is placed in a second operating configuration and/or in a venting configuration; - obturator positioning and movement means comprising: • a temperature sensitive device engaging the obturator to guide it, depending on the oil temperature, into an axial position corresponding to the second or third operating configuration; • a pressure sensitive device suitable to keep the obturator in an axial position corresponding to the first operating configuration and to allow the movement thereof, depending on the oil pressure, in an axial position corresponding to the venting configuration. • a temperature sensitive device engaging the obturator to guide it, depending on the oil temperature, into an axial position corresponding to the second or third operating configuration; • a pressure sensitive device suitable to keep the obturator in an axial position corresponding to the first operating configuration and to allow the movement thereof, depending on the oil pressure, in an axial position corresponding to the venting configuration.