Recently changed the oil in my car and have driven about 10 miles on the new oil. After letting the vehicle cool, when I first check the dipstick there appears to some dark specks clinging to the dipstick within the oil. (See pictures) This has happened both times I've checked after the oil change, but the dipstick comes out with clean oil after the second pull. They don't appear to be metallic and don't seem to emulsify with the oil around it when agitated. Does anyone know what this may be? Never seen this before after any of my oil changes, my only presumption was perhaps it could be the new oil cleaning some buildup left from the old oil? Thanks.