Hello, my MAN F2000 year 96 with 1.36 million on the clock has the following problem. For about one and a half years the oil pressure liesar goes back. This is after heavy stress (mountain on ) when the oil is particularly hot, the oil pressure reaches with ach and krach 3 bar at 1500 rpm. Earlier playing 3.5 bar. I do not have strong oil losses. only the connection to the compressor wets easily. Oil change we make every 65,000 km with filter change. Whether original – MAN motor oil or at the time of Eu 10W40) The oil consumption decreases at about 1 – 2 Lieter to 1000 km. ( is within the scope ) The oil pump is indestructible with the crankshaft and does not break. I reworked the Ventiele a three-quarter year ago. Does anyone have an idea where I can still look. Is this a sign of……?