My daughter purchased this car after someone hit and totaled her Volvo S80. She's only using this as a work car, 100 miles per day and it had 98k miles on it. Long story short, she's put 3400 miles on it since she's had it and when she stopped by today I pulled the dipstick....bone dry. I've read some horror stories about this engine in the equinox but can't find anything on the g6 using oil. Is there a pcv valve on these or is it like my 3.9? I dumped 2.5 quarts in a 4 qt sump to get it back up to full. Also can I use PP 10-30 in this engine to stave off the consumption or is it strictly a 5-30 engine? I changed the oil myself with Mobil conventional when she got it and it was on full.