For some reason this is becoming a problem lately.But it usualy happens to cars that are not properly maintained.If you change your oil every 5,000 miles there shouldn't be a problem with it.Is your car still under warranty?If so it should have been covered under warranty.If you are just out of warranty i would complain to every one i can in the Volvo corp.They might decide to take care of it for you.
Good luck Any more quiestions feel free to ask.
Good luck Any more quiestions feel free to ask.