Brought my car in for a regular oil change and "chirping" under the hood. They changed the oil and my serpetine belt. Chirping noise was still there, but now the oil light would flicker at long stops. Checked oil. It still does this. Mechanic said that can happen. ??? brought it in for this and the chirping noise. They changed the cam sensor and synchronizer housing and oil pressure sender. Still have oil light flickering. Chirping is "fixed". Then recently (end of Sept) my engine was making weird noise--IT WAS OUT OF OIL!!! No oil where I park my car. What is going on with the oil?