Has anyone had this type of marking on there turbo? 2 or 3 blades have rough pitting on the end of the leading edge. It’s a 2019 turbo r with about 600 miles on it. I’m trying to figure out what’s causing this to happen, or if it’s just normal. I flipped it last week and some oil got into the intake, it smoked for 10 to 15 minutes then stopped. I can’t see oil doing this. Maybe fine dirt particles, or what, I don’t know. It seems to be running fine now.