After I changed the oil on a 2007 Toyota Camry I found debris in the bottom of the used oil container. I used a magnet to test and found the debris to be non-metal. Considering the car age is this normal and what could the debris be in the oil?
After more than 6 months, the car is working well.
RoverDriver's answer is realistic.
Here is few more data about the experiment:
- Camry 2007 4 cylinder has a known issue with burning oil
- The oil change was way overdue and there was little oil left in the engine