What are you defining as "a lot" of oil?
Have you asked Volvo what they regard as an acceptable amount?
Do you know what motor manufacturers in general regard as an acceptable amount?
Have you sought any other insight into the issue of engine oil consumption? I suspect that what you regard as acceptable, and what manufacturers and those who build engines regard as acceptable and not unusual, may be somewhat distanced from one another.
https://www.bellperformance.com/blog...d%20acceptable.