That's so weird to me. Do you think by any chance optimize fuel treatment would cause copper to go up? I was using it but I discontinued after this past oil change. I want to see if it has any effect. I doubt it though
Its very entertaining if you think about it. GM pay engineers and and uses resources they dont really have to create an oil life monitor that doesent work properly in this specific vehicle. So they send out a mailer to revert back to the 1980's and say to change oil @ around 7500 miles or around 300 hours until they figure out whats wrong. So now, they have to pay engineers more money to reinvent the wheel.