I’ve been sending oil samples into a lab for an oil analysis (see reports below). We have found out issues with excessive wear.
I took my VCDS diagnostic tool and drove to my testing facility in mountains. The operating oil temp should be around 90 deg Celsius but it is a family car and manufacturers don’t expect constant heavy load around 80-100%.
oil temp 120 deg Celsius in oil sump (oil temp at crank shaft maybe 130 deg C)
external oil cooling