An automotive variable mechanical lubricant pump for providing pressurized lubricant for an internal combustion engine, comprising a lubricant delivery port suitable for being fluidically connected to the engine, a pump rotor with numerous slidable vanes rotating in a shiftable control ring which is provided shiftable between a maximum eccentricity position and a minimum eccentricity position, a control ring preload spring for pushing the control ring into the maximum eccentricity position, a single hydraulic control chamber for pushing the control ring into the minimum eccentricity position, a gallery pressure port suitable for being fluidically connected to the engine, the hydraulic control chamber being charged with the gallery pressure from the gallery pressure port for controlling the remote gallery pressure of the engine via the control chamber pressure in the control chamber, and an integrated overpressure valve in fluidic association with the lubricant delivery port, the overpressure valve opening, if the applied lubricant pressure exceeds a maximum pressure limit, wherein the overpressure valve is a check valve, and wherein the downstream end of the overpressure valve is fluidically directly connected to an atmospheric pump drain port (20"), characterised in that the hydraulic control circuit is provided with a hydraulic control valve directly regulating the control chamber pressure, wherein a valve inlet port of the hydraulic control valve is suitable to be directly charged with the remote gallery-pressure of the engine via the gallery pressure port and a valve outlet port of the hydraulic control valve is hydraulically directly connected to the pump drain port (20"), a valve control port is hydraulically directly connected to the control chamber, and the hydraulic control valve has a hydraulic switch port, or in that the hydraulic control circuit is provided with an electric control valve selectively connecting the control chamber to the atmospheric pump drain port (20") or to the gallery pressure port. a lubricant delivery port suitable for being fluidically connected to the engine, a pump rotor with numerous slidable vanes rotating in a shiftable control ring which is provided shiftable between a maximum eccentricity position and a minimum eccentricity position, a control ring preload spring for pushing the control ring into the maximum eccentricity position, a single hydraulic control chamber for pushing the control ring into the minimum eccentricity position, a gallery pressure port suitable for being fluidically connected to the engine, the hydraulic control chamber being charged with the gallery pressure from the gallery pressure port for controlling the remote gallery pressure of the engine via the control chamber pressure in the control chamber, and an integrated overpressure valve in fluidic association with the lubricant delivery port, the overpressure valve opening, if the applied lubricant pressure exceeds a maximum pressure limit, wherein the overpressure valve is a check valve, and wherein the downstream end of the overpressure valve is fluidically directly connected to an atmospheric pump drain port (20"), characterised in that the hydraulic control circuit is provided with a hydraulic control valve directly regulating the control chamber pressure, wherein a valve inlet port of the hydraulic control valve is suitable to be directly charged with the remote gallery-pressure of the engine via the gallery pressure port and a valve outlet port of the hydraulic control valve is hydraulically directly connected to the pump drain port (20"), a valve control port is hydraulically directly connected to the control chamber, and the hydraulic control valve has a hydraulic switch port, or in that the hydraulic control circuit is provided with an electric control valve selectively connecting the control chamber to the atmospheric pump drain port (20") or to the gallery pressure port.