HELLO and THANK YOU: Oil was mixing with the water in my car's reserve tank. My mechanic checked the head gasket, found a small crack, and replaced it. My mechanic sent the head to a machine shop to make sure there was nothing wrong with it, and it was fine. I got my car back, and when I started it ...

Hello: I recently brought my car for an oil change, and my mechanic found oil in the water reserve tank (a thick creamy beige color substance). He flushed the car's system, but cannot find anything wrong. The car is running fine. I was told to drive the car, and keep an eye on the water reserve tank ...