Yesterday I performed the first scheduled oil change (5k) after converting from dino to M1 HMO on a 2000 corolla (130k). Needless to say, it was pretty black from years of dino. While disposing of the waste oil I noticed strange shiny particles at the bottom of my plastic oil drain change pan. Never seen that before with this car during prior changes (5k). Car burns 1/2 quart during a 5k OCI. At first glance I thought "[censored], its metal shavings". There were maybe 200 of them. I grabbed a few, rolled them around on my fingers to determine if they were metal, and to my amazement they seemed to dissolve or fall apart. They were clear or light in color, as a metal shaving would look, heavier than the oil as they were at the bottom, but they dissolved (seemed to) when I picked them up...
What could it be?
What could it be?