So you have added 3 litres of mixed oils and expect a consistent OA???
And 3 litres were added as top up oil in an engine that holds what, 4 litres max? you have an oil loss issue IMO!
IMO this oil analysis is a waste of time and shows nothing about what the T6 did during your OCI.
cars always used about 1 litre per 7000k, the pcv was puking a bit so it went up a touch, car holds over 5 liters, mixed oil is because this car gets the left over oil from the other vehicles