rpo lc9

I have done quite a bit of research on the 5.3 AFM engine using oil but have not seen any as recent as mine. Since purchased the 2012 GMC Sierra 1500 Crew Cab Z71 4WD SLE with the 5.3L V8 Aluminum Block with AFM (RPO LC9) has eaten oil. It had 368 miles on it at purchase. At 2158 miles I...