I don't own a Lamborghini, but I stick around to help out and dream lol..
If your oil pressure gauge is reading low, you should check your oil immediately. Your oil pressure sender may be malfunctioning or clogged. As I have said before, try seafoam in the oil, change the oil 500 miles after you add it.
It is by far the best treatment that you can do for your engine and I suggest you use it in the oil, gas, and also run through your pcv valve every oil change. Another possibility is that you are burning oil, but I seriously doubt it.
Another tip: The higher viscosity oil you use, the more protection your engine will have. With an engine that revs to 8,000 + I suggest 10w-40 at least. The only down side to this is that you will have to wait longer until the engine heats up before you drive it. 80% of engine wear occurs from cold starts! Never drive when the engine is cold.
You could always get a gauge pod and some aftermarket gauges. Then, you could just look up the pressure specifications at any given RPM and monitor your oil PSI in realtime. It's definatly not something I would take a chance with on a $200k car..