I had the VTC actuator in my Accord replaced due to grinding on start up. I changed the oil after replacement since the valve cover has to come off, and who knows what got in there. I was also wanted to check the sodium level as the previous report had a fair amount of sodium, but I used Mobil 1 which contains NO sodium. This report confirmed sodium is trending down so thats good news. However, copper and iron are up. I'm not so concerned about the iron as I am the copper. Its my understanding that copper comes from bearings, which would have nothing to do with the VTC replacement right? Ill probably run for another 5K and sample again to make sure its trending down.