Was down half a quart when I changed it. Filter was a Purolator PureOne. The copper is curious, going up when iron and aluminium are going down after I slugged it with a ton of dirt. Was tempted to change at 5k, but went 6k because someone said this oil couldnt do it. I can tell you right now though it isnt going to be 6 or 7k miles on this run. Maybe 5k, we'll see. Ive already put 400 miles (~12 hours) or so worth of idling on this change since we got free arctic weather samples over here earlier this week.