Bought a used 2007 grand touring coupe 350z like a week ago. It was in great condition. Car facts and everything said everything was good. Just got it looked at the other day and everything was fine. Had 94k miles. It now has 95k. Leaving work this morning, it was raining hard. My oil pressure was going down on the freeway for the forst time and when I sped up, the car would shake a lil bit. Also, I noticed my brake light on. I checked the fluid level and its not MAX but its right under it toward the middle. The breaks feel perfect. Anybody ran into this problem?? *Sidenote* After the sun came out a little later today and it warmed up, I test drove around the corner and the oil pressure was back to how it was before. I dont know if this is a weather issue or what