I recently analyzed my engine oil from my first oil change done at 1500 miles. I noticed some metals that are not normally associated with oil additives. These foreign metals were aluminum, chromium, copper, iron, manganese, lead, silicon, and titanium. I won't give concentrations because I did not take a control sample of my original oil when I bought the car new. However, I was wondering if the metals could be from engine wear, and if so, what engine components might be giving up each metal. I guess the various bearings throughout the engine and the cylinder walls are the likely candidates for the metal sources, but I was hoping someone could be very specific as to where each metal may be coming from. Thanks for any help.