This post is a little disturbing. I just sold my 2004 Silverado for my 2015 JKU. My old Silverado had 300k on it and never burned a drop of oil.
Question is when did it start burning oil? I just passed 1000 mi wondering if it is first oil change time. Maybe Jeep has issue with cleanliness during motor assembly.
Just a thought on longevity of the motor.
Mine started around 25k. I made it to 48k.