I know this topic is beat to death at times but wanted to share my current situation.
2009 Yukon Denali 6.2 FlexFuel with 147k (no AFM for this year)
I bought it back in August with 141k miles. It is a spare vehicle. I did oil change with Amsoil Signature at that time. In October at about 143k it was a 1qt low. I randomly checked the oil today and it did not even register on the stick and took 2qts.. yikes. So it seems I am averaging 1qt about every 1500-2000 miles. Does this seem excessive?
Also to note, the oil and antifreeze appear clean. And no leaks present at valve covers or underneath. However, I do periodically see a little blue smoke and sweet smell on initial startup. it is not very often though and never notice when driving.
Thoughts? My initial thinking is maybe valve stem\guide seals?