I appreciate everyone's input here. Unfortunately I don't know for sure how long it ran with low oil pressure since my daughter was driving it. My message screen on the dash has been flashing off and on for a dumb light bulb as well as a maintenance message that I can't get to go off so the oil ...

My 2006 XC7-70 is in good condition at about 160K miles. Unfortunately the PCV system, as most Volvo folks know, stopped up and blew out the cam seals while my daughter was driving the car and she wasn't sure what "no oil pressure" meant. I had the car towed home and had to drive for it for minute ...