2009 Iron Block Flex Fuel option engine(never use E85 never will!)
Mostly highway driven.
Started using oil at approx 30K.Using about 1qt between oil change intervals 3-4K miles needs 1qt added before next oil change.
Using Wix oil filters and 5W-30 full synthetic Supertech from Walmart which is GM Approved.
No blue smoke noted on start ups.
Seems to be par for the course from what I read so far,Will monitor to see if it gets any worst.