have any problems with 3.6? I
have any problems with 3.6? I have 2012 Tribeca ,started codes after 37000 mi. In shop now looking at pressure reg. I had trouble years ago with aunts new Olds ,it ran low and light came on at 700 miles. GM rep said it tells you in manual to check oil when fueling, and there was no way they would work on it. A new car! I tore it down and found missing spacers on oil rings on 3 cyl( one bank) I showed them and they promptly told here they would not cover drive train as I had messed with it. No wonder they went out. I think it is time for you to get cyl pressure taken , and if you can have a leak down test done, That would show warn cyls., and rings. If pressures check ok, then valve seals/guides could leak oil. I know earlier 4 cyl. had issues with valve guides slipping in head. Take valve covers off and see if they have migrated toward rockers. I HOPE MY ISSUE IS SIMPLER THAN YOURS. Note if cyl pressure shows wear try high milage oils I had good luck w3ith Castrol Hi Milage