I just finished the first oil change in my 2020 JLUR 3.6 at 601 miles. I always do this with new cars to remove any metal flake from break-in. There was a fair amount of metal flake in the pan, too, and not just the fine, rub away off your fingers kind, either, there was some fairly coarse particles in there as well. I use an antique white ceramic coated wash tub to catch my oil and the bottom of it was basically coated. I haven't changed the oil in a new car in several years. Normal?