An oil filtering assembly for filtering a predefined quantity of oil in the engine of a vehicle, comprising: i) an oil filtering device; ii) a heat exchanger; iii) a support body for the filtering device and the heat exchanger, fixable to the engine, comprising at least one duct having at least an inlet mouth through which oil flows from the engine and at least one outlet mouth through which the oil flows towards the filtering device, wherein the duct has on the side wall which delimits it, at least one exchanger mouth through which the oil flows into the exchanger; iv) 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; • a filter opening through which the oil flows towards the filtering device 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) an oil filtering device; ii) a heat exchanger; iii) a support body for the filtering device and the heat exchanger, fixable to the engine, comprising at least one duct having at least an inlet mouth through which oil flows from the engine and at least one outlet mouth through which the oil flows towards the filtering device, wherein the duct has on the side wall which delimits it, at least one exchanger mouth through which the oil flows into the exchanger; iv) 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; • a filter opening through which the oil flows towards the filtering device 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; • a filter opening through which the oil flows towards the filtering device 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; • a filter opening through which the oil flows towards the filtering device 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.