Fuel pressure


I have a 1.4 petrol. I have made a fuel pressure measurement. The spec is 3.0 bar without pressure regulator and 2.5 with. My values are 3,1 bar both with and without the pressure regulator. I guess I have to replace the pressure regulator. It is cheap and easy to replace. I just wonder if it is important to have exactly 2.5 bar? It seems not very big difference between 3.0 and 2,5 bar?